114 PROCEEDINGS OF THE AMERICAN ACADEMY 



I. 0.1106 gr. of substance gave 0.2774 gr. of CO^ and 0.05G3 gr. 



of up. No ash. 

 II. 0.2180 gr. gave 0.5450 gr. of CO^ and 0.1099 gr. of 11,0. Ash 

 0.0007 gr. 



III. 0.2149 gr. gave 0.5376 gr. of CO.^ and 0.1090 gr. of Up. 



Ash 0.0006 gr. 



IV. 0.2195 gr. gave 0.5480 gr. of CO, and 0.1099 gr. of H^O. 



Ash. 0.0006 gr. 

 V. 0.2743 gr. gave 0.6815 gr. of CO2 and 0.1378 gr. of Up. 

 Ash 0.0010 gr. 



I. II. III. IV. V. Mean. 



Carbon 68.43 68.39* 68.42* 68.27* 68.00* 68.30 

 Hydrogen 5.65 5.62 5.69 5.59 5.60 5.63 



All these analyses were made with curcumin from Bengal turmeric: 

 I. and II. of different portions of the same sample, III., IV., and V. 

 of different samples. 



The following analysis was made of curcumin extracted from 

 Madras turmeric : — 



0.3467 gr. gave 0.8612 gr. of CO, and 0.1870 gr. of H,0. No ash. 



Carbon 67.74 



Hydrogen 5.99 



The sample analysed was very red, and the somewhat lower per- 

 centage of carbon obtained was undoubtedly due to the presence of an 

 impurity which causes the curcumin to crystallize in red burrs, as is 

 shown by the following analysis of a very red sample of Bengal cur- 

 cumin : — 



0.2168 gr. of substance gave 0.5400 gr. of CO, and 0.1057 gr. of 

 H,0. No ash. 



Carbon 67.93 



Hydrogen 5.42 



* These numbers become, if the ash is not subtracted from the weight of the 

 substance : — 



II. 

 Carbon 68.17 



Hydrogen 5.60 



