18 ORGANIZATION AND BUILDINGS. 



having a combined capacity of 900 gallons, located on the south 

 side of the boiler room. The tanks are so connected that they may 

 be used either together or singly. Coal-storage capacity of 30 tons 

 is provided on the north side of the boiler room. 



Two Mansfield oil gas generators of a capacity of 100 cubic feet 

 per hour each are installed close to the coal bunkers and deliver gas 

 to two sheet-steel gas holders, each of 1,250 cubic feet capacity, 

 located 100 feet from the power-house building. A 12-inch smoke 

 header connects the gas-generator furnaces to the main stack. 



A cremating furnace 10 by 5 by 6 feet is built at the foot of the 

 main stack, having 12 square feet of grate surface and an incinerat- 

 ing chamber of 4 by 2| by 2J feet for burning laboratory refuse, 

 small animals, etc. 



All piping, conduits, etc., connecting the various apparatus in 

 the boiler room pass through a concrete trench covered by checkered- 

 steel floor plates to the pipe subway, from which point they are 

 carried to the basement corridor in the main building. The piping 

 ranges in size from one-fourth inch to 8 inches, and wire conduits 

 from one-half inch to 2J inches. The subway and corridor are 

 automatically drained by Lawlor cellar ejectors worked by water 

 pressure. 



The west end of the main basement corridor contains a storage 

 battery of 20 cells from which current is conveyed to various 

 laboratory rooms. 1 



The engine-room, equipment consists of two horizontal single- 

 expansion Ideal automatic engines of 60 horsepower each, direct 

 connected to two Westinghouse 37-|-kilowatt six-pole compound- 

 wound direct-current generators. Each unit has a capacity of 

 300 amperes at an electromotive force of 125 volts at a speed range 

 of 290 to 320 revolutions per minute. The generators are fitted 

 with equalized connections for parallel working. Current is led 

 from the generators through loricated-steel conduits laid below 

 the flooring to a 5-panel black slate switchboard 15 feet long. Each 

 generator is protected by an I-T-E laminated contact circuit 

 breaker. The switchboard has two-generator one-power distribut- 

 ing and one light-distributing panel, and one panel for instruments ; 

 it also carries all the air, gas, vacuum, water, steam, and electrical 

 indicating and recording gauges. Ten light-and-power feeders are 



1 Pis. X and XI are photographs of the boiler rooms. 



