11 



and cocoa products, which were printed as an unnumbered circular of 

 the Bureau of Chemistry and circulated for criticism. No further 

 action has been taken. 



IX. TEA AND COFFEE. 



Twenty-first Convention, 1904, Bui. 90, Cir. 20. 



The methods outlined by the associate referee, Mr. H. C. Lythgoe, 

 were adopted as provisional. (See Bui. 90, p. 38, or Cir. 20, p. 7, for 

 the full text of these methods.) 



ERRATA. 



Under " 13. Alkalinity of the Ash," the editor wishes to call atten- 

 tion to the fact that for all other subjects the methods of the association 

 direct that methyl orange shall be used as indicator in the determi- 

 nation of the alkalinity of the ash. 



Under "20. Cane Sugar," second line, for " 13.024" read "13." 



X. SPICES. 

 Twentieth Convention, 1903, Bui. 81, Cir. 13. 



On page 58, under "13. Determination of Starch by Diastase 

 Method," fifteenth line, strike out the words "copper reduced by," 

 and insert therefor "dextrin resulting from the inversion of." 



Twenty-second Convention, 1905, Bui. 99, Cir. 26. 



Methods for the analysis of prepared mustard, proposed by the 

 associate referee, A. L. Winton, were adopted as provisional. (For 

 full text of these methods see Cir. 26, p. 9, or Bui. 99.) 



XI. VINEGAR. 

 Twentieth. Convention, 1903, Bui. 81, Cir. 13. 



On page 65, following section "13," insert Crampton and Simons's 

 method for the detection of caramel as a provisional method: 



DETECTION OF CARAMEL (CRAMPTON AND SIMONS ). 



Add 25 grams of fuller's earth to 50 cc of the vinegar under examination, beat the 

 mixture up in a beaker and let it stand covered half an hour at room temperature, 

 then filter. The determination of the figure representing the color is made with the 

 tintometer upon the liquid before and after treatment, and the difference between 

 the two results gives the percentage of color absorbed. 



a J. Amer. Chem. Soc., 1899, 21: 355. 



Twenty-second Convention, 1905, Bui. 99, Cir. 26. 



Page 68, sixth paragraph, on malic acid, eliminate the following 

 words: 



The presence of malic acid distinguishes cider vinegars, though the quantity is often 

 small. * * * If a precipitate be obtained, parallel tests with silver nitrate and 



