AMERICAN INSTITUTE. 215 



The importance in a sanitary point of view of having pure fresh 

 milli on sea voyages, in armies, ^c, where other fresh provisions 

 cannot be obtained, and of absolutely pure milk in cities, for chil- 

 dren, invalids, and others, has been sufhcient to stimulate with 

 the scientific and ingenious, continued investigation and experi- 

 ment, for its preservation, unchanged in character and quality. 

 This desideratum had been unsuccessfully supplied, until the 

 present process of solidification, or chrystallization resulted in a 

 perfectly successful accomplishment. 



An ordinary specimen of tlie " dry milk" has been deposited 

 here; several thousand pounds of a precisely similar quality may 

 be seen at 23 South street, or any of the stores. 



This article is made by applying a low degree of heat to new 

 milk before the separation of the cream, in such a way as to pro- 

 duce an exceedingly rapid evaporation of the watery portion, 

 leaving the solid (that is the casein) and oleaginous constituents 

 entirely unchanged. IS"© better proof of this is needed than the 

 fact that good butter, cheese and ice cream, can be made from it 

 equally as well as from milk fresh drawn from the cow, even if it 

 has been in a solid state for years. 



The chief characteristics and advantages of this article, and 

 which belong to it alone, may be briefly cited as follows, viz : 



1. Entire purity! There being nothing used in its manufacture 

 except fresh milk, and a small quantity of the best refined white 

 suga?. (For children, invalids, cooking, &c., see report of the 

 New- York Academy of Medicine; also certificate of Dr. Doremus. 



2. It will keep longer than most articles of food, whether at 

 sea or on shore. (See statements of Dr. E. K. Kane, Capt. Mum- 

 ford, Col. Eaton and other seamen, soldiers, travelers and mis- 

 sionaries. 



3. More nutriment for the human system is contained in a 

 given quantity than in any other kind of food, which is a con- 

 sideration of great consequence to soldiers, persons crossing the 

 plains, and others in like circumstances. 



4. It is cheap enough to be within the means of all persons, 

 and although it is not supposed that it can ever supply the place 

 of pure milk in the liquid condition ; still the dilference is but 

 slight, when the presence of the sugar is considered. 



