Six rats per set. Weight on the first day:

A 85 B 84

For four days both A and B were fed on the regular diets. At the end of the fourth day:

A 97 B 98

B were now fed on bread alone. On the 75 day:

A 165 B 107

B were now given bread plus potatoes. On the 110 day:

A 173 B 125

Fat was now added to the diet of B. On the 124 day:

A 172 B 132

It is apparent that bread alone does not fulfill all conditions, and that the addition to such a diet of potatoes and fat is beneficial.