@ 
Fig. 1. Curve showing the growth of the mice. 
The abscissas represent the age of the mice in 
weeks, the ordinates their weight in grams. 
Control line 33 mice 
—-— — — Alcohol line 16 mice not given alcohol themselves 
—-——— Alcohol line 39 mice given alcohol 
Bh SOB — Nicotine line 6 mice not given nicotine themselves 
ei ne Nicotine line 42 mice given nicotine 
—— —— ~— — Smoked line 9 mice not subjected to tobacco fumes themselves 
— — — Smoked line 57 mice subjected to tobacco fumes 
—_.—— Caffeine line 8 mice not given caffeine themselves 
— —- — Caffeine line 27 mice given caffeine 
148 
