3 



[several times with hot water by decantation, the washings being passed through 

 la filter paper, to which the material is finally transferred and thoroughly washed. 

 The filtrate is evaporated to dryness over a water bath, avoiding unnecessary 

 heating, which causes decomposition ; 5 c. c. of nitric acid of 1.15 specific gravity 

 are added, and the mixture thoroughly stirred and allowed to stand for thirty 

 minutes. The nitric acid decomposes the ammonium mucate, precipitating the 

 | mucic acid, which is collected on a tared filter or gooch, washed with from 10 

 to 15 c. c. of water, then with 60 c. c. of alcohol, and a number of times with 

 ether, dried at 100 C. for three hours, and weighed. The mucic acid multiplied 

 by 1.33 gives galactose, and this product multiplied by 0.9 gives galactan. 



WILLIAM H. KRUG, 



Referee on Foods and Feeding Stuffs for 1901. 

 Approved : 



JAMES WILSON, Secretary. 



WASHINGTON, D. C., April 18, 1902. 



