The more frequent use of low fat milk formulas, especially in certain cases of infant feeding, makes necessary some simple method of modifying the milk in homes where the fat content of the milk is unknown or a variable factor. Even when formulas furnishing larger methods of fat are desired, an easy and reliable method of modification, applicable to home conditions, will be helpful.
There are already in general use several methods suited to meet the conditions for which they were devised. For example, if a high fat milk formula is desired, Holt's1 method of siphoning off the upper part of the milk is in every way adequate; or, if one desires a 3 per cent. milk and has a 4, 4.5 or 5 per cent. milk, Schereschewsky's2 method may be employed, although according to Darling3 this has certain limitations, for the results are apt to be