78 



ai'.d distributing it over the building. In the sliops tlie distribution is 

 through sheet metal pipes that are suspended against the upper portion 

 of the side walls. The temperature is controlled by a regulating device in 

 the heating chamber. By this scheme the ventilating apparatus can be 

 closed to any portion of the building not in use. It may be used also as a 

 supplementary heating system in severe winter weather. 



POWER. 



The electric current used for ]»ower and lighting is generated in a plant 

 that is about tliree hundred yards away from the nearest point in the shops. 

 It is of the alternating kind and is brought to the building at a tension of 

 twenty-two hundred volts and is then stepiwd down to two hundred 

 twenty volts in a transformer that is placed just outside of, and in the 

 rear of the shops. The portion used for power purposes is carried to a 

 number of small motors that run groui)s of the machines or that run indi- 

 vidual machines: there are seventeen groups in all besides the individually 

 driven machines. 



In the wood working shop it h:\s been possible to place the motors in 

 the basement, and this is especially desirable in wood working, as it tends 

 to freedom fron; dust. This was not possible in the machine shop, because 

 of the design of the driving heads of ordinary machine tools. 



The general arrangement of the building is shown in Fig. 2, AAhere the 

 floor area devoted to tiie various purposes is shown, also. 



Adjacent to every one of the shops there is a room for demonstration 

 purposes. This is arranged so that a machine may be conveyed from its 

 place on the shop floor and used during the exposition of its purposes. 

 Power for this purpose is brought to these class rooms ; and to furnish 

 current for the projection lantern in the large lecture room, there is a 

 separate set of wires from the ])ower house, Itringing a direct low tension 

 current. This low tensidu current; is carried at one hundred ten volts. 



CONVENIENCES. 



The basement under the main corridor has the locker and toilet rooms; 

 a battery of forty wash basins supplied with hot and cold water, and rows 

 of metal lockers are arranged at each end. There are individual lockers 

 for eight hundred fifty students, in wliidi tiiey keej) their work clothes. 

 In llie shops there are also sejtarate lockers for eight hundred tifty stu- 

 dents, in wiiich the niaferial ou whicli they are working is placed wheij 

 not iu use. 



