associated in "the development of the science that has changed the face of civilization." After more hearty cheering, Mr. John W. Mackay, Jr. made a brief address in a bright, enthusiastic way. The healths were then drunk of the President of the United States and of Queen Victoria; and then came a number of speeches by other officers, present from all parts of the world. It was quite late when the banquet ended, having proved a most enjoyable success. Never before in telegraphic circles had the owners and directors of a vast system sought to meet the representatives of every department on terms of equality and good will.

The morning of the 25th was spent at headquarters in an informal discussion of business matters and in the extension of personal acquaintance.

A comparative statement of cost of working and maintenance, including interest on the total investment, has been made for the General Manager. This comparison is between the 33 storage battery cars, 21 Pintsch gas cars and 137 cars lighted with kerosene oil. The comparison indicates that the cost of the electric lighting is about 13 per cent. less than that of lighting with Pintsch gas, and 70 per cent. more than that of lighting with oil lamps. We give these figures, however, says the Railroad Gazette, as being still quite uncertain, and are not yet so convinced of their accuracy as to venture to publish them in detail.

The system used is the Silvey storage battery already known to our readers. This battery is built up of lead grids laid horizontally, the positive and negative plates being separated by a special packing. These plates are cast with rectangular cells which hold the active material, and each pile is carried in a hard rubber jar.

The train unit of battery weighs about 600 lbs., and two of these units are called a set. These are carried underneath the middle of the car, the boxes which receive them being fastened to the framing and having end doors and being provided with rollers on the bottom, so that the boxes carrying the batteries An ordinary coach may be may be conveniently slid in and out. lighted for the run from New York to Cincinnati and back by two sets, that is, 2,400 pounds of battery, although the sleepers, the postal cars and the dining cars, and perhaps some of the coaches, carry three sets, say, 8,600 pounds. The battery gives 36 to 40 hours of lighting with 148.8 candle power in each As a matter of fact, the dining cars have sufficient current stored to last them five or six days, they often being recharged on the sixth day.

car.

TELEPHONE SERVICE AT MESSAGE RATES.

THE METROPOLITAN TELEPHONE AND TELEGRAPH Co., N. Y., has established a new schedule of rates for telephone service which went into effect on June 1st. The present flat rates of $20 per month for business use and $18 per month for residence use will continue in force, and no existing contracts will be affected by the new rates, but those desiring telephone connection in future will have the option of paying for their service in proportion to the amount of service rendered. This method of charging, analogous to that which has long obtained with the supply of gas, water and electricity for lighting and power, will put the telephone service within the reach of many business men and householders who have hitherto felt that their probable use of the service would not justify the payment of the present flat rates. These, of course, are based on the average use of large and small users taken all together, and although the system is part of the history of the telephone business and has all the tenacity and solidity of a firmly rooted custom it obviously bears heavily on the small user. This customer will now have his wants catered to by the supply of telephone service at a minimum annual rate of $100 for a station on a two-station party line or $150 for a direct line. For the former rate the subscriber will be entitled to call for 700 connections in the year and for the latter 300 more. The rate per additional hundred connections begins at $12.00 and scales down to $7 as the number of messages contracted for annually increases. These rates are for messages used in excess of those contracted for in advance. When the subscriber estimates his probable use and contracts in advance for a certain number of messages he gets them at $2 less per hundred all along the scale. For instance, a subscriber contracts for a direct line at $150, and is entitled to call for 1,000 connections during the year. If he runs over the 1,000 he will pay $10 for the next hundred, but if he contracts for 1,100 in advance he will pay only $8 for the additional 100 messages. If he does not use any of the additional hundred the $8

will be returned to him. There is an initial charge of $15 for installing a station.

The service will be of the same character as that now furnished, that is, metallic circuit lines and long distance instruments, and in every respect those who join the Metropolitan system under the new rates will be on exactly the same footing as the present subscribers, with the single exception of the method of paying for their services.

99

This innovation is to a certain extent an experiment on the part of the Metropolitan Company, undertaken in the light of the experience gained with the public telephone station traffic. With a view to catering to the occasional user of the telephone the company has, during the past year or two, very largely added to the number of its public "pay stations. There are now more than 1,000 of these stations scattered throughout New York City and from the use of them by "all sorts and conditions of men,' there has arisen a distinct demand on the Metropolitan Company for a class of service which should be intermediate between the public pay station and the private telephone station at flat rates. The new system of rates provides exactly that. It gives a private telephone service on a pay station basis, with the simple businesslike proviso of a minimum amount of use and a minimum rate. We feel little doubt that this tentative step of the Metropolitan Company is in the right direction. It is made with all caution and prudence and the scheme contains nothing that can provoke unfavorable criticism or opposition on the part of present subscribers. There is no obligation on present or future subscribers to take either class of service. The actual subscriber can change to the message rate system if he wishes to, on the expiration of a contract in force, and the new subscriber can take service at the flat rate. We fancy that the majority of new subscribers will prefer to pay according to the new method. The strong point about it is that it brings telephone service within the reach of the small user.

Subjoined is the full schedule, taking effect June 1, 1894, for New York city, south of 110th street:

For more than 2,000 messages Direct Lines only will be used, and the rate of advance will be $5.00 per hundred, with $7.00 per hundred for excess messages.

For these rates, lines will be metallic circuit and equipped with long distance transmitters (wall or desk sets only). For a cabinet set (wall or desk) $10.00 per annum additional will be charged. An installation charge of $15.00 will be made for each station. Where an established station is brought under a Message-Rate contract, the installation charge will not be made.

ROSE POLYTECHNIC INSTITUTE.

The Rose Polytechnic Institute, at Terre Haute, Indiana, is one of the few endowed and thoroughly equipped colleges of the country devoted exclusively to the professional education of civil, mechanical and electrical engineers and chemists. Though one of the youngest of these institutions, perhaps none of them has met with greater success in filling the present demand for professional training in electricity, regarded as one of the branches of mechanical engineering. It has been able to do this by reason of a fortunate combination of circumstances, which developed its plan of instruction, and the purchase of its equipment just at the time that this public demand for electrical education became imperative.

While this plan insists upon and fully develops the theoretical side of the instruction, and includes the modern languages as well, it lays especial emphasis on the practical side of technical education, as it is able to do throughout the whole course of four years by reason of ample shops, drafting rooms and laboratories, and an exceptionally complete outfit of instruments of precision. The teaching force is so organized as to render shop practice most effective. It consists in addition to the ordinary faculty of instruction, of a body of skilled workmen, or shop instructors, whose entire time is devoted to regular shop routine with the students. This makes it possible for students not only to complete the designs for machinery in the drafting rooms, but to build it in the shops, and also to test it in the laboratories.

THE COMPTON ELECTRIC BASE BALL REPORTER.

MANY efforts have been made from time to time, especially by the daily papers, making a specialty of sports, to give to the public who cannot leave town some idea of how the games and races are progressing at any moment. Everyone remembers the ball field diagram on which each day's game was shown in front of a newspaper office on Park Row, and that was ordered down because popular enthusiasm was so great as to completely block the street and prevent traffic. This very fact showed beyond

could wish. The circular holes, with the exception of those marked b represent the position of the players and show by their color which side is at the bat and which in the field. Those representing the side in the field do not change during an inning, but the progress of a man running the bases is indicated effectively and amusingly. When the batsman hits a fair ball his number disappears from the home plate and there is an instant of suspense before one knows what has become of him. Should he succeed in reaching first base the picture of a man suddenly appears at that point, and, if New York is at the bat, the audience goes

FIG. 2.-THE COMPTON ELECTRIC BASE BALL REPORTER.

crazy at once. Should he be put out, however, it is shown by the number, 1, 2, or 3, as the case may be appearing in the aperture marked" out," in the left hand lower corner. The score, innings, man at bat, strikes, balls, etc., are indicated as shown in the figure.

The back of the flat, with the mechanism for making the changes is shown in Fig. 2. Each movement is effected by means of an independent electromagnetic motor with a vibrating armature similar to that of a call bell, that cuts itself out automatically at each half revolution, and everything is controlled from the switchboard, Fig. 3, the operator receiving the report of the game telegraphically by a private wire from the grounds, and simply making the changes as he receives his information. It will be seen that Figs. 1 and 2 correspond exactly in a reversed position; i. e., if the page be folded so that the two are back to back they will occupy their true relationship to one another.

The same idea, somewhat modified, has been used in posting the official scores at the grounds.

LEGAL NOTES.

THE GETTYSBURG TROLLEY ROAD TO STAY.

In the United States Court in Philadelphia, the motion of the United States Government to enjoin the Gettysburg Electric Railway Company from building a branch trolley road on the Gettysburg battlefield was denied, and the motion dismissed.

SHAPLEIGH CUT-OUT NOT INFRINGED.

The Shapleigh suit was decided last week in the United States Circuit Court at Philadelphia by Judge Dallas. The suit was brought by Marshall Shapleigh of Pittsburgh, against the Chester Electric Light and Power Company to enjoin them from using a cut-out to prevent the burning out of incandescent lights when an excessive current is turned on. The cut-out in use by the Chester

Company, is manufactured by the Emerson Electric Light and Power Company of St. Louis, and Shapleigh claims that it is an infringement on his patent. Judge Dallas refused the injunction and dismissed the suit at the plaintiff's cost on the ground that no infringement was shown.

SOCIETY AND CLUB NOTES.

THE BROOKLYN ELECTRICAL SOCIETY.

"The Practical Construction of the Telephone" will be the subject of the next regular lecture of the Brooklyn Electrical Society which will be given on Thursday evening, June 7, at the residence of Mr. R. J. Simes, Jr., No. 26 Prospect Place, Brooklyn. The speaker will be Mr. Thomas A. Bamford, who will construct a telephone before his audience.

The Brooklyn Electrical Society which has recently been organized is composed of a number of young men who are interested in the practical uses of electricity. Many of them are graduates of the Pratt Institute Electrical Class of 1894 and the society was formed for the dissemination of knowledge among its members. Among the papers read recently were, "A Sketch on Underground and Overhead Electric Traction " and a well written "Direct-Driven Generators." paper on

Five consecutive papers on Electro-metallurgy will soon be read before the society; also an illustrated paper on "How to Build a Phonograph," besides illustrated talks on the telegraph and dynamo and other important electrical apparatus.

The meetings are at present held at the members' houses, but in the Fall the society will accept the offer of Manager William S. Barstow of the Edison Electric Illuminating Company's Station on Pearl street, Brooklyn, to use the Company's lecture room. Membership in this society is open to all interested in electricity. The officers of the society are as follows: William C. Burling, president; William C. Otten, vice-president; Arthur A, Fisk, secretary and treasurer.

THE AMERICAN INSTITUTE OF ELECTRICAL ENGINEERS.

THE monthly meeting of the western members of the Institute was held at Armour Institute, Chicago, on Wednesday evening, May 23. The meeting was even better attended than the preceding one, an interesting audience of over 125 being present.

Mr. B. J. Arnold being chosen chairman of the meeting introduced Mr. Alexander J. Wurts of Pittsburgh, who presented his paper on "Discriminating Lightning Arresters." The reading of the paper was supplemented by practical demonstrations with current, several very interesting experiments being performed by Mr. Wurts, many of them eliciting great applause. The chairman, with a few well chosen remarks, then called upon Mr. Arthur V. Abbott of the Chicago Telephone Co. to open the discussion, which proved very interesting and was participated in by Messrs. Pierce and Gutman, Prof. Stine, Dr. Lobach and others. Mr. C. C. Haskins being unable to attend, sent a very interesting communication relating his experience with lightning and lightning arresters in the early days of telegraphy, the communication being read by the honorary secretary, Mr. Caldwell. On motion of Mr. R. E. Pierce, which was carried unanimously, a vote of thanks was tendered Mr. Wurts, and on motion of secretary Caldwell a vote of thanks was given to Prof. Stine and assistants for their services during the lecture and for allowing the use of apparatus of the Armour Institute.

PERSONAL.

MR. E. J. WESSELS, who returned from Bermuda recently after a long sojourn there for the benefit of his health, has had the Genett air brake placed in his hands by the Seligman banking interests, to be pushed actively. This brake is peculiarly adapted to use on high speed electric cars, and Mr. Wessels' large acquaintance with the street railway field makes him a valuable man to represent it.

GAS ENGINES FOR ELECTRIC LIGHTING IN GERMANY.

MR. F. H. MASON, United States Consul General to Germany, states that there are in operation throughout Germany about 25,000 gas motors aggregating 80,000 horse power. He states that through the cheapening of gas, and the rapid extension of electric lighting and other applications of electricity, the use of gas motors has been very largely increased of late. As evidence of this, he states that the two principal makers of gas engines in Germany have alone made and delivered during the past two years 1,950 motors.

INVENTORS' RECORD.

CLASSIFIED DIGEST OF U. S. ELECTRICAL PATENTS ISSUED MAY 29, 1894.

Accumulators :

Element for Secondary Batteries, S. A. Rosenthal and V. C. Doubleday, London, Eng., 520.614. Filed Dec. 5, 1892.

Consists of a corrugated and perforated sheet of lead and an enclosing casing of non-conducting material in which the plate is firmly fastened. Alarms and Signals :

Safety System for Railroads, W. H. Elkins, Cambridge, Mass., 520,520. Filed Oct. 22, 1892.

An automatic electric block system for steam railways.

Fire Alarm Apparatus, F. J. Thunhorst, Allegheny, Pa., 520,547. Filed
Feb. 26, 1894.
Electric Railway Signal, C. Selden and H. V. Riley, Baltimore, Md., 520,661.
Filed Feb. 16, 1894.

An automatic visual electric block system for steam railways.
Electric Railway Signal, C. Selden and H. V. Riley, Baltimore, Md., 520,710.
Filed Feb. 16, 1894.

Similar to No. 520,661.

Conductors, Conduits and Insulators :—

Insulator, C. E. Conover, Cincinnati, O, 520.412. Filed May 20, 1893. Insulator, H. H. Luscomb, Hartford, Conn., 520,602. Filed March 19, 1894. Consists of a metallic case containing insulating material and having its lower edge turned upward as a protection to the latter.

Insulator, L. McCarthy, Boston, Mass., 520,606. Filed Sept. 23, 1892. Consists of a metallic case and a metallic pin separated one from another by insulating material and a layer of the latter over the whole. Dynamos and Motors :

Alternating Current Motor, W. Stanley, Jr., Pittsfield, Mass., 520,620. File1 Feb. 1, 1894.

Employs a compensating synchronous motor, means for mechanically connecting it with an alternating current working motor and connections between both motors and the supply circuit.

Method of Operating Electric Motors, J. S. Bancroft, Philadelphia, Pa., 520,748. Filed Dec. 10, 1892.

Employs a rheostat regulating the admission of current to the field of the generator, a similar switch admitting a constant potential current to the field of the motor, and an interlocking between the two switch levers. Galvanic and Thermo-Electric Batteries :—

Electric Battery, S. H. Hoggson, St. Louis, Mo., 520,429. Filed Mch. 6, 1893. Employs cells arranged in a vertical series and electrically connected. Miscellaneous:

Electric Cigar Lighter, D. Misell, New York, 520,445. Filed Dec. 5, 1893. Electric Clock Striking Mechanism, C. D. Warner, Ansonia, Conn, 520,585. Filed Apl. 6, 1893.

Therapeutic Electrode, W. B. Farrar, Greensborough, N. C., 520,673. Filed Apl. 5, 1894.

Railways and Appliances :

Trolley Wire Support, B. J. Jones, Sioux City, Iowa, 520,737. Filed Feb. 5, 1894.

Consists of a supporting piece of triangular form adapted to fit a bend in the trolley wire and having its outer surface in the samne horizontal plane with that of the remainder of the wire. Conduit Railway Trolley, W. Lawrence, New York, 520,758. Filed Aug. 17, 1892.

Switches and Cut-Outs :

Circuit Closer, G. W. Hey, Syracuse, N. Y., 520,427. Filed Mch. 11, 1893. Switch, H. P. Ball, Bridgeport, Conn, 520,474. Filed Mch. 12, 1891.

A jack-knife switch composed wholly of sheet metal, the fixed blades formed of single strips of couducting material bent to form contact for the circuit wires.

Telephones and Apparatus :—

Magneto Telephone, A. F. Boardman, Somerville, Mass., 520,406. Filed Mch. 24, 1894.

Employs a permanent ring magnet and a clamping bar of non-magnetic material secured at its middle to the casing and with its ends engaging the ring magnet.

Speaking Attachment for Telephones, W. Weber, Philadelphia, Pa. Filed Feb. 15, 1894.

A flexible speaking tube one end of which is attached to the telephone transmitter and the other end carrying a mouth piece and an arm to support the receiver.

Testing System for Multiple Switchboards, C. E. Scribner, Chicago, Ill., 520,543. Filed Aug. 24, 1891.

Has for its object to provide a test signal of such a character as to be readily distinguishable from false signals produced by accidental causes.

LITERATURE.

Proceedings of the Electrical Society of Cornell University, 1893-1894.

THIS volume of 93 large octavo pages contains a selection of ten papers read before the society ranging over a wide scope of topics in both the practical and theoretical branches of electricity. All the papers show careful preparation and contain much information of value. Those on "Notes on Some of the Work of Nikola Tesla," by E. B. Clark, and The Tesla High Frequency Phenomena," by R. W. Quick, are of more than ordinary interest and show an excellent grasp of the subject, indeed far beyond what one would expect in undergraduates. If the society maintains the high standard established by the contents of its first publication it may well hope to realize the expectations of its president, Mr. E. B. Clark, that it "will rank among the foremost engineering societies in American universities."

Trade Notes and Novelties

AND MECHANICAL DEPARTMENT.

THE BELKNAP MULTIPOLAR GENERATOR.

THE BELKNAP MOTOR CO., of Portland, Maine, is one of the concerns that is crowded with orders and, notwithstanding the hard times, is building a large addition to its factory preparatory to going into the manufacture of large railway generators and motors.

The accompanying illustration shows the new Belknap multipolar generator which this enterprising company has just put on the market. The frame of the machine is made up of several parts, making it convenient to handle. The total weight is quite uniformly divided between the several parts, as shown, making a very convenient machine to set up in stations which are not provided with apparatus for lifting very heavy weights. The bed is planed to fit iron slides and is very rigidly constructed so as to withstand the strain brought on it by the weight of the field mag

ENGINE WORKS DRIVEN BY ELECTRIC POWER. LAST week the main shaft broke near the source of the driving power at the works of the American Engine Co., Bound Brook, N. J. Fortunately a Loomis multipolar generator was available and as its speed was only 320 revs. per min. it was belted directly to the shaft at a point just beyond the break and current was supplied to it by the regular lighting system which was driven by the engine independently. In a few hours everything was humming along as merrily as ever, all the power being furnished by electricity.

QUEEN & CO. IN NEW YORK.

THE many friends of Mr. G. S. Woolman, so many years engaged in the scientific instrument business at 116 Fulton St., New York, will be interested to learn of a very important change in his affairs. The firm of Queen & Co., of Philadelphia, with whom he was connected earlier in life, having found it necessary owing to the great volume of their business in the vicinity of New York to establish a branch there, have purchased Mr. Woolman's entire business and have secured his services as their New York manager. From the Philadelphia staff of the Electrical Department, Mr. O. T. Louis, formerly in charge of resistance standardization in Queen & Co.'s laboratory at Ardmore, has been detached and stationed at the New York office. The establishment of this New York branch will be a great convenience to the many customers of Queen & Co., in New York and will undoubtedly result in largely increasing their already extensive business in that vicinity.

THE HILLHOUSE PRIMARY BATTERY FAN MOTOR. THE accompanying illustration shows a small fan motor with an 8 inch fan recently introduced by Messrs. Hillhouse & Co., of

THE BELKNAP MULTIPOLAR GENERATOR.

net. The magnet consists of two iron castings, the two together forming a complete circle with four inward projecting cores to receive the field coils. The magnet is bored and fitted with a pole bushing surrounding the armature, which gives the greatest possible effective polar arc. This prevents the disagreeable humming sometimes observed with toothed armatures under heavy loads and suppresses the tendency to spark by reason of stray lines of force.

The armature is of the toothed hollow drum type. By a system of end connections, the crossing of the conductors at the leads of the armature is avoided, which reduces the danger of burn-outs, and every wire can be got at conveniently. The commutator is massive and the well-known Belknap woven wire and graphite brushes are used. The bearings are very large and are self-aligning and self-oiling. The two terminals are located at opposite sides of the machine to avoid the danger of a short circuit. The field cores are compound wound and the magnetic circuit of the machine is carefully designed with reference to the reluctance of cast iron, wrought iron and air so as to get the best attainable effect from the materials used. Such a machine should find a ready market.

THE HILLHOUSE PRIMARY BATTERY FAN MOTOR.

136 Liberty street, and designed to take current from a primary battery. It is extremely simple in construction and runs at a high rate of speed on Edison-Lalande, Premier-De Mott and all wet or dry open circuit batteries, as well as upon all closed circuit batteries, requiring only about 1 volt and a little less than 1 ampere. Such an outfit as this should prove especially valuable in offices or private houses not wired for electric lighting. It is made by the Armature Bell Co., of Newark, N. J.

A REVIVAL OF WORK AT THE BALL & WOOD ENGINE WORKS.

THE business of the Ball & Wood Company has so far recovered from the general business depression that they find it necessary to increase their force by the addition of a night gang. Beginning to-day, their works at Elizabeth, N. J., will be run to their full capacity, twenty-four hours a day, which speaks well for one of Elizabeth's youngest industries and for the reputation of the company's engines. By a singular coincidence it is exactly one year ago that the night gang was laid off in this establishment.

BRISTOL'S RECORDING WATTMETER.

THE accompanying engravings illustrate a new recording wattmeter that is being manufactured and introduced by The Bristol Company of Waterbury, Conn., to supplement their present line of recording voltmeters. The general design of the wattmeter is the same as that of the voltmeter, the principal modification being that a coil wound with a heavy conductor is substituted for one of the stationary coils of fine wire. This method of adapting the recording voltmeter to a recording dyna. mometer or wattmeter was planned for and fully described in the specifications of the patent of the voltmeter.

Referring to the engravings, Fig. 1 shows the instrument complete ready for connection; Fig. 2 shows the interior construction and manner of operation. The coil A, wound with fine wire, is mounted on spring knife-edge supports and is free to move toward the stationary coil B, which is wound with a heavy conductor capable of carrying the entire current to be measured. The terminals of the coil A are connected to the positive and negative conductors, and the magnetic effect of the current through this coil of high resistance will be dependent upon the voltage, while the magnetic effect of the main current through the coil B of low resistance will depend upon the number of

ACTIVITY OF THE ELECTRICAL AND MECHANICAL ENGIN EERING AND TRADING CO.

A LITTLE more than a year ago, Mr. J. H. Vail organized the Electrical and Mechanical Engineering and Trading Co. The company now have in hand a variety of business, among which may be mentioned the following: Contract for car house, cars, motors, trucks and generators for Hoosick Railway Co., Hoosick Falls, N. Y.; contract for an electric light station and complete equipment at Rumsen Neck, N. J., for the Rumsen Improvement Co.; contract for electric lighting in new addition to Buckingham Hotel, New York city; contract for underground conduit system, telephone system and electrical conductors for J. C. Hoagland and Raymond Hoagland, Rumsen Neck, N. J.; consulting engineers for Trinidad Electric Light and Power Co., Port of Spain, Trinidad; contract for electric lighting system, underground conduits, pole line, etc., for Edward Kemp, Esq., Rumsen Neck, N. J.; supervising and consulting engineers for Poughkeepsie city and Wappingers Falls Electric Railway Co. This railway system will require a 600 h. p. steam plant, compound condensing engines and direct driven generators; there will be some fine long distance work, as one section of the road extends ten miles to the towns of Wappingers Falls and New Hamburgh, operating cars in and

amperes passing. The mutual attraction of the coils will be the product of these magnetic forces and proportional to the number of watts. The marking arm F is attached directly to one of the knife-edge spring supports of the movable coil and partakes of its motion, recording the variations of electrical energy on a uniformly revolving chart.

While the actual motion of the coil is quite small it will be seen that the angular motion of the pen arm affords a sufficiently open scale on the chart without resort to ordinary multiplying mechanism which would introduce friction. As the only bearings in the instrument are the knife-edge supports of the movable coil it is extremely sensitive to the smallest changes of current. The magnetic balance principle involved in the construction makes it possible to entirely avoid the use of permanent magnets.

The divisions on the chart shown are kilowatts with a total range of eleven kilowatts. The stationary coil is designed for a maximum current of one hundred amperes. For larger currents proportional shunts are employed.

AN ELECTRIC FLEET FOR BOSTON.

The parks of the city of Boston are to be equipped with a fleet of about 250 boats, including a number of electric launches, which are to be charged from the Edison circuits, Gen. C. H. Barney is to be commodore of the fleet.

between both towns. The plant will incorporate Stirling boilers, compound condensing Ball & Wood engines, direct driven General Electric generators and "G. E. 800" motors.

Mr. Vail gives all the business of his company his personal attention, and turns out none but the best of engineering and construction. The company have pleasant and commodious offices at 39 Cortlandt street, where may be found some of the most expert and experienced engineers engaged in the business.

OERLIKON ALTERNATORS WITH STATIONARY ARMATURES.

WE have received from the Maschinenfabrik Oerlikon bei Zürich, Switzerland, an illustrated catalogue of their alternating generators for lighting and power. These machines are built in sizes from 20 to 700 H. P., and are characterized by a stationary armature with revolving field magnets. These alternators are built to deliver single or three-phase currents up to 5,000 volts potential and give high efficiencies, only from .2 to .8 per cent. of the total power being required for the field excitation. These alternators are built both with horizontal and vertical shafts for direct connection with turbines. It will be recalled that an Oerlikon Machine was employed to generate the three-phase current in the celebrated Frankfort-Lauffen transmission. The works also build a large variety of motors of the alternating type.