n6 
EMPLOYMENT PSYCHOLOGY 
feed machine has a revolving table ringed with holes or 
pins which the operator has to keep filled with the parts 
upon which the machine is operating. In some shops these 
dials revolved very slowly and therefore did not require 
fast operators. In other shops they revolved very quickly 
and required very fast operators. The foreman of the 
largest of these shops stated that seven girls out of ten 
failed to make good as operators on his machines. 
The test which was finally developed to meet these con 
ditions was similar to, and still quite different from, the 
Bogardus piece. Its motive power consisted of an old 
graphophone motor. The advantages of this motor were 
its comparative compactness and simplicity. On the top 
of the graphophone dial was placed a round, sheet-metal 
disk, large enough so that it projected considerably over 
the edge of the motor box. Near the edge of the disk 
were cut two slots eight inches long and an inch and a half 
wide. These slots were fitted with slides which made it 
possible to regulate the size of the opening. Under this 
disk, and attached to the motor box in such a position 
as to be directly under the slots in the revolving disk, 
was placed a funnel. At the neck of this funnel a Veeder 
counter was attached in such a way that a one-inch steel 
ball dropped through the funnel would cause it to register. 
The object of the test was to revolve the sheet-metal disk 
so that the slots in its border passed over the mouth of 
the funnel at a certain number of revolutions per minute. 
As the slot passed over the funnel, the operator, or person 
being tested, was to drop the steel ball so that it would 
fall through the slot and into the funnel below it, where it 
would be registered. If the ball were dropped on the disk 
or at one side of the opening, it would naturally fail to 
register.