38 HUGO MÜNSTERBERG 
the adjoining experimenter’s room, and double doors also separ¬ 
ate this from the main hall. The wall between these two rooms 
consists of two layers of plaster with special deadening material in¬ 
serted between. Two small tubes, ordinarily stuffed with felt con¬ 
nect these rooms. When the acoustical stimulus is a tuning-fork it 
is placed in a distant room, connected with one of the b circuits 
of the sound-proof room, and then with a telephone receiver near 
the subject’s ear. 
The photographic-room contains the ordinary sink, red lights 
shelves, etc. The indirect entrance is light-tight when the door 
is not closed, so that the experimenter may pass in and out even 
when developing is going on. This room, like all the others which 
have no window (except the sound-proof room), has forced ven- 
tilation. 
The class-room is designed for the experimental training-courses. 
It has eight of the regular delivery-boards, ten tables, instrument- 
case, blackboard, and sink. 
The lecture-room for specialized courses in comparative and ex¬ 
perimental psychology seats eighty students. It is provided with 
two Bausch and Lomb electric projection-lanterns, horizontal and 
vertical microscope attachments, and attachment for the projection 
of opaque objects. On the lecturer’s platform, besides the black¬ 
board, projection-screen, and chart-racks (capable of holding twenty 
charts), is a large demonstration-table provided with a delivery- 
board, water, gas, sixteen chart-drawers, two other drawers, and 
three cupboards. 
As has been said before, the general psychology course of the 
University is not given on the laboratory floor, but downstairs in the 
large lecture-hall with about 400 seats. A number of large demon¬ 
stration instruments of the laboratory serve the special purpose 
of this course; this hall too has its own stereopticons. 
Our instrumentarium is, of course, in first line, the collection 
of apparatus bought and constructed through the fourteen years of 
work Yet with the new expansion of the institute a considerable 
number of psychological, physical, and physiological well-tested 
instruments has been added. Especially in the departments of 
ymographic, chronoscopic, and optical apparatus the equipment 
presents a satisfactory completeness; its total value may be estimated 
to represent about twelve thousand dollars. Yet the place of the 
laboratory which we appreciate most highly is not the instrument- 
room but the workshop, in which every new experimental idea can