1911-12.] A Method of Measuring Mental Processes. 
87 
Case IX. — Maniac Depressive Curve. 
Showing marked constancy of the middle five-minute period. 
85 — <■ — 85 
Case No. II. — Maniac Depressive Curve. 
Showing marked inconstancy of the middle five-minute period as well 
as throughout. 
120 120 ' 
In the work done by the patients in the quiescent stage of the disease 
(Curve X) the curve of the whole group shows some striking features. 
Here, again, the initial spurt was the highest. A tendency to spurt was 
evident throughout the test, but this was inconsiderable. After the eightli 
minute a higher level was attained, but even then the output only on two 
occasions, viz. the eleventh and fifteenth minute, reached the normal. 
The initial output was considerable, but rapidly fell ; these patients were 
evidently incapable of further excessive production ; they approached the 
