Volltext: Princeton Psychological Laboratory (9)

270 
H. S. LANGFELD 
Storeroom.—A room 11 ft 7 in x 15 ft 3 in has been furnish¬ 
ed with shelving around the walls for the storage of records, 
old journals, etc. 
Electrical Supply.—The alternating current, which goes 
to all the rooms, is obtained from the general circuit of the 
University. Direct current is obtained from two sources, 
storage batteries and a no-volt generator. There are 35 
Edison B4 batteries arranged in six units of five cells, one 
unit of three cells, and one unit of two cells. Each cell gives 
approximately 1.2 volts. These cells are placed in a cabinet 
in the carpenter shop. The generator is at one end of the 
machine shop near a large switch-board, which was made to 
order by the General Electric Co. Wires lead from the 
batteries and generator to the board and from the board to 
almost every room in the building. There are six lines to each 
room, but where there are adjoining research rooms, each 
line serves two rooms; that is to say, one can plug into the 
same line from either side of the wall. The switchboard is so 
arranged that one can connect the current from the generator 
or from one or more units of batteries with any room. Seven 
rooms can take off current from the generator at the same 
time. There is also a rheostat on the switchboard by which 
the voltage may be increased or cut down when desired.
	        
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