212 DIGES'TIBILITY 
product is free from all forms of germ life. ‘The only exception 
to this rule would apply to concentrated milk, in the manufacture 
of which the milk is not heated to temperatures detrimental to 
the life of bacteria. 
Digestibility—In this discussion of the digestibility of con- 
densed milk it is assumed, that the condensed milk, unless used 
in.admixture with other foods, is diluted to approximately the 
consistency of normal milk. If consumed as a drink, similar to 
milk but without proper dilution, its concentration, and con- 
sequent excessive richness, would obviously seriously interfere 
with digestion. While there are no experimental data available 
concerning the digestibility of condensed milk, the results of 
feeding experiments with heated, pasteurized or sterilized milk 
vs. raw milk, may furnish a logical guide as to the dietetic effect 
of condensed milk. Milk pasteurized at high temperatures, or 
sterilized, may be considered comparable, as far as the effect of 
heat is concerned, to condensed milk. 
Doane and Price! report the following experimental results: 
“Raw milk is more easily digested when fed to calves than either 
pasteurized, or cooked milk. Contrary to theory, cooked milk, 
when fed to the calves used in these experiments, caused violent 
scouring in the majority of trials. A majority of physicians in 
charge of children’s hospitals corresponded with, favored the use 
of raw milk for infants when the milk is known to be in perfect 
condition, but favored pasteurized milk under ordinary condi- 
tions. \Vith one exception all the physicians corresponded with, 
discouraged the use of cooked, or sterilized milk for infant 
feeding.” 
Rosenau* states that “Comparative observations upon in- 
fants under the same conditions show that they flourish quite as 
well upon heated milk as upon raw milk. Laboratory experi- 
ments as well as clinical observations coincide with the view, 
that heated milk 1s quite as digestible as raw milk. In fact it is 
now claimed to be more so. Metabolism experiments indicate 
that the utilization of calcium and iron in the body is more com- 
plete in children fed upon boiled cow’s milk, than in those fed 
upon raw cow’s milk. 
1 Doane and Price, Maryland Agricultural Experiment Station, Bulletin 
No. 77, 1901. 
* Rosenau, United States Department of Agriculture, Bureau of Animal 
Industry, Circular No, 158, 1910. 
