242 



CREAM. 



SPECIFIC GRAVITY OF CREAM. 



What is the specific weight of cream ? 



Berzelius, 1 an established authority on chemistry, 

 says, 1024.4. Dr. Yoelcker 2 says, 1012, 1019. 

 Letheby 3 1013, and Dr. Hanneberg, 4 of Stockholm, 

 1004.9 and 1005.5. It is an American authority, 

 Prof. L. B. Arnold, 5 who obtains a result as low as 

 985. 



In my own experiments, using cream from the top 

 of a cream jar, I have obtained a specific gravity of 

 983 by weight ; and on the other hand, I have found 

 cream which would sink in water. It must seem ex- 

 ceptional and strange that such an apparently simple 

 product as cream should show such wide discrep- 

 ancies. If authorities are right, then cream is not as 

 simple a substance as it is ordinarily described. 



We will now examine some analyses of cream, and 

 observe what the results teach us. 



ANALYSES OF CREAM. 



1 Johnston's Ag. Chem. p. 548. 3 Lectures on Food, p 34. 



2 Journ. R A. 8. 1863, pp. 317, 298. * Quoted in Ag of O. 1858, p. 281. 

 6 Sixth Kept. Am. Dairymen's Association, 1870, p. ItiO. 



6 Prof. Muller, quoted, Trans. Vt. Dairymen's Association, 1872, p. 150. 



7 Dr. Percy, Trans. Med. ^oc. of State of N". Y. 1860, p. 47. 



8 Dr. Voelcker, Jouru. K. A. 8. xxiv, p 298. 



9 Dr. Hamuberg, quoted, Ag. of O., 1853, p. 282. 



