'. Chittenden — Oxidation product of Glycogen. 



Ba'* 25-99 26-14 26-21 



O, 42-64 



HHaO 9-64 .--. 9-41 



The crystals of this salt are very readily soluble in hot and cold 

 water, 'but insoluble in alcohol. 



The air-dried crystals when placed over concentrated sul- 

 phuric acid lose 642 per cent of water. The calculated amount 

 for one molecule of water is 6-74 per cent. On drying the 

 crystals at 100° C. the remaining one-half molecule is driven off. 

 Heated at 120° C. the crystals turn brown and swell up. 



Cadmium Salt. — On treating an aqueous solution of the acid 

 with cadmium carbonate, on the water- bath, a soluble cadmium 

 salt is obtained which does not crystallize. The salt is precipi- 

 tated from its solution by three or four volumes of alcohol, then 

 redissolved in water, filtered through animal charcoal, and re- 

 precipitated by alcohol. It is thrown down from its solution 

 as a flocculent precipitate which soon becomes gummy, and 

 when hard yields on trituration a perfectly white powder. 



The analysis of the salt dried at 100° "C. gave the formula : 

 C,H,,Cd'd,. 



I. 0-3924 grams of the salt dried at 100° C. gave -4105 grams 



COg and -1618 grams H2O. 

 II. 0-3544 grams of the dned salt gave •3'702 grams CO2 and 

 •1412 grams HgO. 



Cd't 22-31 22-V6 22-29 



O, 44-70 



Cobalt Salt — On heating an aqueous solution of the acid 

 with cobaltic carbonate, on the water-bath, a cherry-red solution 

 of a cobalt salt of the acid, is obtained, which does not crystal- 

 lize readily from the aqueous solution. On the addition of 

 alcohol to a concentrated or only moderately dilute solution of 

 this salt, a heavy pink colored precipitate forms which soon 

 becomes gummy. 



This precipitate, after being washed with alcohol and dried at 

 100° C. gave by analysis the formula: CgH, iCo'O,. 



♦Ba'=68-6. tCd'=56. 



