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shell(s) shall be made of steel having a tensile

strength of not less than , and shall be

tested to pounds hydrostatic pressure.

Bidders shall state the guaranteed evaporation from feed water at to dry steam at

pounds gauge pressure per rated horse-power, and per hour, and the amount of consumed.

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a responsible steam boiler insurance company, this contractor to furnish a certificate of inspection and a policy of insurance for

207. Fittings. ( TJ'opVi )

] The [ boiler sna11 be provided with the necessary lugs, brackets, plates, bolts, stays, anchor and binder rods, man and hand poles, steam and blow-off connections, stop and safety valves, pressure gauge, water column, gauge cocks and drip, set of stoking tools

consisting of , and all other appliances

properly coming under this head.

208: Setting. The boiler(s) shall be set in masonry in a first-class manner, according to standard practice. This contractor to do all necessary excavating or filling for the foundation(s) and to remove all debris. The foundation(s) must be firm and substantial. All material shall be such as is especially adapted to the strains, stresses, and variations in temperature to which it will be subjected.

(Specify character of soil upon which boilers ,will be placed.)

Smoke connections of , having an area 200. smoke

Coiiiieclions

-, are to be made with the stack, and are

to be provided with dampers and

cleaning doors arranged as follows: .

(Note.—Specify material, height, capacity, 210. stack, etc.)

automatic stoker(s') of standard manu- 21gjJ,££rTMatic

facture connected ', and operated .

(Specify how coal is to be delivered to them.)

, feed pump(s) of standard manu- 212. Feed

e , / 1 \ i • ,j. c Puiiip(s)and

racture (each) having a capacity of , lujeotarm.

together with injector(s) as an auxiliary

source of supply. (Specify suction heads.)

feed-water heater (s) [and purifier(s)] ^fy^eed

of standard manufacture (each) having a Hnatmw <nnd

.... , , , , V' ft Purifler(s)).

capacity ot heated from to .

(Specify character of water to be used, and whether exhaust steam is to be used for any other purpose than heating feed-water.)

separator(s) of standard manufacture, 211. separa

having a capacity of , and a guaranteed

efficiency of

tor (8).

(Note.—Specify kind of pipe to be used, 215. piping, method of suspension, all distances, locations of pumps, separators, etc., headers required,

walls to be pierced, auxiliary connections,
etc. It is sometimes very desirable, where a
number of engines and boilers are installed,
to place a valve in the main steam pipe both
near the boilers and near the engines by
either of which steam can be cut off from all
engines at once; there should invariably be
in addition to these valves a valve in each
branch so that steam may be shut off from
any boiler or any engine without interfering
with the operation of the remainder.)
From boiler(s) to engine(s); from engine(s)

to heater(s), and from heater(s) to ;from

boiler(s) to pump(s) and injector(s); from pump(s) and injector(s) to (water supply), and from pump(s) to feed-water heater(s) and exhaust pipe; together with all check, globe, gate, angle, safety and other valves, traps, catch basins, drips, cocks, gauges, by-passes, and other devices necessary for the proper and convenient control and manipulation of the steam and water supply. Bends and elbows are to be avoided when possible.

21BoardSe ^ SauSe board of shall be erected in

, and the following instruments mounted

thereon: . Connection shall be made between these instruments and in the following manner .

217. ripe All shall be carefully covered with a

substantial, non-heat-conducting material, such as '.

(As required.) 218. Paintiug.

Such renewal parts as it is advisable to J19.^l^wal

have on hand shall be furnished, a list of same to be added hereto.

(See note.—p. 47, sec. 27.) «>• summary.

Each bidder shall fill out completely the following summary:

Number of boilers ....

Rated horse power ....

Kind

Diameter

Length

Number of tubes ....

Diameter of tubes ....

Heating surface ....

Grate area

Tensile strength of shell . .

Testing pressure

Guaranteed evaporation . .

(Fuel) per horse-power and per hour .

Outside dimensions of setting .

Number of pumps ....

Capacity of each ....

Number of heaters ....

Capacity of each . . ...

Number of separators . . . .

Capacity of each . . .

RULES OF THE NATIONAL ELECTRIC LIGHT ASSOCIATION.

Adopted at Montreal, Sept. 10, 1891, and Amended at Buffalo, Feb. 23, 1892.

CLASS A.—CENTRAL STATIONS.—FOR LIGHT OR POWER.

These Rules also Apply to Dynamo-Rooms in Isolated Plants, Connected With or Detached from Buildings Used for Other Purposes. Also to all Varieties of Apparatus, of both High and Low Potential.

Generators Or Motors—Must be:

1. Located in a dry place.

2. Insulated on floors or base frames/ which must be kept filled to prevent absorption of moisture, and also kept clean and dry.

3. Not exposed to flying or combustible materials.

4. Each covered with a waterproof cover when not operating.

In no case must a generator be placed in a room where any hazardous process is carried on, such as the working room of a cotton, jute, flax, woolen or flour mill.

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