OF ARTS AND SCIENCES. 197 



Calculated for Found. 



Ca(C 6 H 5 3 ) 2 . 2 H 3 0. I. II. HI. IV. 



Ca 12.28 12.24 12.31 



H 2 11.04 10.97 10.99 



I. 0.2688 grm. salt dried at 110° gave 0.1254 grm. CaS0 4 . 

 II. 0.3109 grm. salt dried at 110° gave 0.1452 grm. CaS0 4 . 



Ca 



In determining the solubility of the salt, the calcium was precipi- 

 tated as oxalate and weighed as sulphate. 



I. 6.8529 grm. of a solution saturated at 20°. 2 gave 0.4104 grm. 

 CaS0 4 . 

 II. 7.8851 grm. of a solution saturated at 20°. 2 gave 0.4688 grm. 

 CaS0 4 . 



i. H. 



12.77 12.68 



Argentic Methylpyromucate, AgC 6 H 5 3 . — This salt may readily 

 be made by precipitation of a soluble salt with silver nitrate, and 

 may be recrystallized from hot water. It is sparingly soluble even 

 in boiling water, and crystallizes from aqueous solution in fine 

 slender needles. 



I. 0.2110 grm. salt gave on ignition 0.0977 grm. Ag. 

 II. 0.4007 grm. salt gave on ignition 0.1855 grm. Ag. 



Calculated for Found. 



AgC 6 H 5 3 . I. II. 



Ag 46.34 46.30 46.29 



Sodic Methylpyromucate, NaC 6 H 5 3 . — The sodium salt is ex- 

 ceedingly soluble even in cold water. It separated from its solu- 

 tion in dilute alcohol after long standing in compact clusters of 

 small anhydrous needles. 



I. 0.2752 grm. air-dried salt gave 0.1325 grm. Na 2 S0 4 . 

 II. 0.4240 grm. air-dried salt gave 0.2034 grm. Na 2 S0 4 . 



Calculated for Found. 



NaC c H 5 3 . I. II. 



Na 15.53 15.60 15.53 



Potassic Methylpyromucate, KC G H 5 3 . — The potassium salt is 

 also very readily soluble in cold water, and crystallizes in spherical 

 aggregations of short prisms, which appear to be anhydrous. 



