TEA ANALYSES ADULTERATION DEFINED. 



879 



changes were the same and of the same extent. These analyses are of 

 especial value on account of Mr. Kozai's knowledge of tea manufacture 

 and his residence in a tea-producing country. The percentages are 

 referred to the dry matter. 



1 Portion of original sample of leaves dried at 85 C. 



2 Calculated as gallotanic acid. 



This table shows the marked difference between the composition of the 

 green and the black .teas. In the black tea there is a very considerable 

 increase in the " other nitrogen-free extract." This increase has evi- 

 dently taken place at the expense of the tannin, a part of which has been 

 decomposed during the fermentation. This reduction in the tannin is 

 probably one of the reasons why black is considered more wholesome 

 than green tea by the English, but the change in the tanniu alone will 

 not account for this preference. There are not sufficient data concerning 

 the " other nitrogen-free extract" and other constituents for a further 

 discussion of this question or for a statement as to whether this pref- 

 erence for black tea by the English is not merely a prejudice. 



ADULTEKATION DEFINITION. 



The law of th<* State of New York (see Part 2, Bulletin 13, p. 239) 

 defines adulteration of food as follows : 



The term " food," as used in this act, shall include every article used for food or 

 drink by man. The term " drug," as used in this act, shall include all medicines for 

 internal and external use. 



b. In the case of food or drink. 



(1) If any substance or substances has or have been mixed with it so as to 



reduce or lower or injuriously affect its quality or strength. 



(2) If any inferior or cheaper substance or substances have been substituted 



wholly or in part for the article. 



(3) If any valuable constituent of the article has been wholly or in part 



abstracted. 



(4) If it be an imitation of, or be sold under the name of, another article. 



(5) If it consists wholly or in part of a diseased, or decomposed, or putrid, or 



rotten animal or vegetable substance, whether manufactured or not, or, 

 in the case of milk, if it is the produce of a diseased animal. 



