114 PROCEEDINGS OF THE AMERICAN ACADEMY 



I. 3.1531 grm. lost at 100° C. 0.3748 grm. 

 II. 2.508 grm. dried at 100° C. gave 0.011 grm. ash. 



III. 0.3189 grm. gave 0.508 grm. CO^ and 0.187 grm. HO 



IV. 1.2677 grm. gave 0.0761 grm. NH^Cl. PtClj. 

 Corresponding in 100 parts to 



I. 

 Carbon 43.44 



Hydrogen 6.51 



Nitrogen 0.38 



Ash 0.43 



Water 11.88 



Estimated as above, we have 



C Nitrogen 0.38 



I Carbon 1.31 



Nitrogenous constituents, ^ Hydrogen 0.17 



I Oxygen 0.53 



(^Sulphur 0.04 



2.43 



94.79 



r Carbon 42.13 



Non-nitrogenous constituents, < Flydrogen 5.85 



( Oxygen 46.81 



Water not expelled at 100° C. | hydrogen 0.49 



^ \ Oxygen 3.92 



4.41 



•Ash 0.43 



102.06 



Reduced to an average percentage, we obtain 



Dried at 100° C. Tresh. 



Nitrogenous constituents 2.38 2.10 



Inorganic " 0.42 0.37 



Starch, sugar, &c. 92.88 81.84 

 Water not expelled at 100° C, and 



accidental moisture 4.32 3.81 



Water 11.88 



100.00 100.00 



" No. III. Tapioca. 



"Tapioca is a modification of starch, being partially converted into 

 gum by heating. It is prepared from the root of the Jatropha ?nanihot, 

 found in the West Indies, South America, and Africa. The roots are 

 washed, reduced to pulp, and subjected to strong pressure, by which 



