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It is known to our readers that a number of arc lamps of the greatest city the world has ever seen. A mistake have been installed in the City in order to obtain opinions too frequently made is to think that beauty of form and

example must be set to those towns that follow the lead of modern Babylon. We are amongst those who believe the engineers have not quite realised the possibilities of the case, and the temporary standards, as erected, seem a little deficient in artistic merit. An illustration of the standards erected in Queen Victoria-street hardly meets the case. They ought to be seen in situ to be able to decide as to their design. However, so far as illustrations will assist, we herewith give various designs of arc lamp standards. Fig. 1 shows the standard as erected in Queen Victoriastreet by the Brush Company. To us the knobby excrescences are an eyesore, and rather put us in mind of an

FIG. 5.

elegance of design are incompatible with the bustling activity and the narrow streets of City work. The idea that "anything" will do must be negatived, and a good

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antediluvian ladder; the ornamentation and proportions of the base are also crude and inartistic. With the head of the standard we have not much fault to find, either as in Fig. 1 or as in Fig. 2, the latter of which shows the head of the standard as proposed for the portion of the City to be lighted under the Laing, Wharton, and Down Syndicate. The base and centre-piece of both standards are the same. Figs. 3 and 4 show the standards as used in Berlin; Fig. 5 is a design for a standard for the City, by Mr. W. Doubleday, of Birmingham, as is also Fig. 6.

Alhambra.-At the performance of "Oriella" at the Alhambra, all the ballet electric effects have been carried out by Mr. Chas. S. Northcote, engineer to Messrs. B. Verity and Sons.

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four friction wheels, and gradually passes down and out at the larger end. During the passage the material comes again and again into contact with the magnets, and any iron becomes attached to them. The iron is carried round by the magnets, and as the action of the commutator breaks contact just as the magnets rise over a shelf, the iron drops off upon the shelf. The material traversing the cone comes about a hundred times into contact with the magnets, so that there is little probability of a piece of iron getting

away.

Messrs. Christy and Carter's separator was also shown, but this apparatus needs some improvement before it can be said to be perfect.

Of engines portable, semi-portable, and horizontal, there was a fine display. Most of these engines are of the well-known types of the manufacturers, and call for little comment. Fig. 1 illustrates a semi-portable engine of Messrs. John Fowler and Co., of Leeds. Like most, if not all, of these makers' engines, Hartnell's gear is used, and the governing is such that the variation of speed is not more than 1 or 2 per cent. between full and no load. Fig. 2 shows a fixed engine by Messrs. Ruston and Proctor, and Fig. 3 a portable engine by the same firm. Since last year's show Messrs. Ruston and Proctor seem to have incorporated several improvements, the principal of which are the enlargement of the cylinder and of the firebox, so that a recent 8 h.p. is about equivalent to an old 10 h.p., with the advantage of a reduction in cost. Fig. 4 shows a portable engine by Messrs. Clayton and Shuttleworth. The workmanship of all these engines is the best possible.

(To be continued.)

THE NAVAL EXHIBITION.

The exhibit of the T. G. Electric Power and Traction Company, Limited, Maldon Works, Kentish Town, London, N.W., at the Naval Exhibition represents admirably the

lamps are run off a combined engine and dynamo, which at
320 revolutions per minute gives an output of 150 amperes
and 80 volts. The plant is specially designed for use aboard
On the same circuit
ship, and conforms to the Admiralty requirements as
regards heating, duration of runs, etc.
are run the motors for driving pump, fan, tramcar gear,
and machine tools. A motor and gearing similar to that
used at the North Metropolitan Tramway Depôt at Canning
Town and the Liverpool Tramway Company is also shown
running. The motor has a cylinder armature and gives
10 brake horse-power at about 900 revolutions per minute i
when supplied with current at 190 volts. The armature is
cased in at either end; the brushes are of carbon, in holders
of a specially arranged type, patented by the company,
and used most successfully by them for motors of all
descriptions. The gearing consists of two transmissions,
and the high-speed pinion is built up of fibre.
The same form of motor
practice it is found that tramcars with this gear make less
noise than ordinary horse cars.
truck, slightly modified, is used by the company for light
railways.

In

1

A machine worthy of special note is a portable drill, with radial arms, capable of drilling holes up to 1in. in iron and steel. This machine is driven by an Immischh.p. motor, and is an admirable illustration of the portability of electric tools. It is as convenient in every respect as an ordinary power drill, and combines the further advantage i of portability.

A set of three-throw pumps illustrates the company's method of applying electricity to high-lift pumps in mines. Some dozens of these plants are now at work in different parts of Great Britain, the Continent, and the colonies, and in all cases they have given the highest satisfaction, realising a high efficiency with a minimum attention, cost, and wear. The parts are so simple, and the general details so well throughout, that breakdowns are of rare occurrence, and owing to the interchangeability of parts such accidents are easily guarded against.

On the stand is also an Immisch launch motor with patent ball-bearing thrust block, such as is used by the

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Combined Engine and Dynamo.

varied classes of work carried out by this enterprising company. It comprises both ship plant and general installation work, and shows some interesting examples of the application of electric power to machine tools and other purposes; whilst by no means the least useful part of the exhibit is a set of three-throw high lift ram pumps run by one of the company's mining motors, and a small fan coupled direct to the shaft of a motor shows a cheap, efficient, and noiseless means of ventilating crowded halls and theatres. The stall is brilliantly and tastefully lighted by a number of frosted 16-c.p. incandescent lamps in artistic fittings, many of which are especially suited for use on board ship. These

company for general boating work. The machine is light compact, and efficient, weighs about 350lb., and develops 3 brake horse-power at 800 to 900 revolutions per minute. Some interesting examples of high-speed propellers are also shown, which serve to mark the advances the company have made in this branch of their work.

The boat switches fitted with three levers-one for starting and stopping through a resistance, one for full speed and half speed, and the third for running ahead or astern-are compact and workmanlike, and have now stood the test of two seasons' experience.

In the grounds just outside the Camperdown Gallery the

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