My experience has only extended to a very moderate use of alcohol and tobacco. I find that even the most moderate use of tobacco is decidedly hurtful to energetic mental effort. With regard to alcohol, a very moderate amount does not appear to depress the mental condition, under ordinary circumstances, but I find that although I never indulged in its use I can do very well without it, and I am doing with less and less. Under certain conditions, however, I find that alcohol has a beneficial effect in restoring both mind and body to a state of power and activity.

C. W. SIEMENS.
Dec. 4th, 1882.