1905-6.] Effects of Varying Diets upon Growth and Nutrition. 91 
Chart II., in which observation the ox-flesh animals lived and 
thrived for several months, but gained in weight more slowly and im- 
perfectly than the controls (bread and skim-milk fed) ; and although 
kept along with males, the females failed to become pregnant. 
Influence of a Meat Diet on the Second Generation. 
The following figures illustrate the high mortality in early life 
of the second generation of meat-fed animals 
Litters. 
Rats. 
No. alive 
at end of 
One Month. 
Percentage 
alive at end of 
One Month. 
Meat (ox flesh and horse 
13 
93 
19 
20 
flesh) 
Bread and skim milk 
14 
97 
82 
84 
The effects of a meat diet on pregnancy are further shown by 
the following history of one rat which had four litters : — 
Date. 
Diet. 
Number 
of Young. 
Result. 
Litter 1. 
April 22 
Bread and 
skim milk 
9 
All lived and thrived. 
9 
J ; 
June 23 
Horse flesh 
9 
All died within two 
months. 
„ 3. 
July 30 
Horse flesh 
6 
All died within one 
month. 
„ 4. 
Sept. 9 
Bread and 
skim milk 
8 
All lived and thrived. 
Observations on the Recuperative Powers. 
Observations were made on the recuperative power of animals 
which had been fed on an unphysiological diet for some time 
during the growing period and then transferred to a normal diet. 
Chart III. illustrates the recuperative power of three rats placed 
on a normal diet of bread and skim milk, after they had deteriorated 
in consequence of having been fed for six weeks on a diet of rice, 
horse flesh, and porridge respectively. 
