The object of this paper is to call attention to the accidents which may arise from the very exactness of the methods employed. I do not mean to say the accidents arc inherent in the methods; I am going to call your attention to certain responsibilities on the part of the physician. Accidents may arise in mechanical ways; they may arise from faults of a higher order. Let us assume that we are agreed upon the following:
1. That cow's milk is the only variety of milk to be considered in substitute feeding. 2. That dairy cleanliness is necessary. 3. That the modification of milk according to some definite formula is demanded. 4. That it is desirable to have the milk modified in a laboratory for purposes of cleanliness and exactness.
The discussion of the respective values of gravity and centrifugated cream does not enter into consideration here; a laboratory