127 



CEREAL PRODUCTS. 

 It is recommended 



That methods applicable for the separation of the gluten constituents of flour be 

 studied, tests to be made upon the several grades, as patents, first and second clears 

 and on flours produced from different varieties and types of wheat. 

 Adopted. 



CANNED VEGETABLES. 

 It is recommended 



That methods for the detection of soaked peas be further studied. 

 Adopted. 



MEAT PROTEIDS. 

 It is recommended 



That the work on the separation of meat proteids be continued along the lines 

 pursued i In- past year. 

 Adopted. 



TEA, COFFEE, AND COCOA. 

 IM- rtM ommended 



(1) That methods for the estimation of caffein be further studied. (Original Gom- 

 berg Method, J. Amer. ('hem. Soc., 1896, p. 331, and modifications.) 

 Adopted. 



Hut th.- hulioi- in.-thod for the determination of sugars in chocolate be further 

 studied. (J. Amer. ( h.-rn S.K-., 1907, 29: 556; Bui. 107, p. 256.) 



(3) That tin- Doolittle and Woodruff method (Bui. 105, p. 48) for extract in tea be 

 substituted for the Krauch method (Bui. 107, p. 149, sec. 5) as provisional. 

 Adopted. 



COLOBS. 

 hi- r. < > in mended 



(1) That an effort be made to obtain authentic samples of vegetable or natural 

 coloring matters, such as are used in food products. 



(2) That a study be made of the characteristics of vegetable coloring matters and 

 mnh.Hls of identification. 



(3) That pure colors be synthetically prepared to serve as standards. 



(4) That the separation aiut identification of mixed colors be studied. 

 These recommendations were adopted. 



REPORT OF COMMITTEE ON THE TESTING OF CHEMICAL 



REAGENTS. 



By L. F. KEBLER, Chairman. 



There has been a marked improvement in the chemical reagents examined by the 

 chairman of the committee during the past year. This, however, may be largely 

 due to a we<>d ing-out process that has been going on for several years. It was a com- 

 mon experience a few years ago to be compelled to report adversely on the quality 

 of many chemicals which included not only actual adulteration, but indicated gross 

 carelessness in manufacturing and packing. The chemicals found to be of inferior 

 quality during the past year were generally lacking in certain minor respects; for 

 example, contamination with insoluble material or some associated impurity which 

 would be detrimental to the analytical operations for which the reagent was to be 

 employed. 



One of the difficult features at present is a satisfactory nomenclature. In the past 

 it has been common to use in connection with chemicals supposed to be of high 

 quality the abbreviation C. P., but this abbreviation has come to be meaningless and 

 should be discontinued. It still serves one good purpose and that is, if a chemical 



