25 



repeatedly boiled with hydrochloric acid and washed with hot 

 water but it was impossible to entirely remove the ash. When 

 examined this was found to consist of silica, aluminum and 

 traces of calcium. The powder was dried at a temperature of 

 105 and analyzed, with the following result: 



I 0.283 Gm. gave 0.2045 H 2 O, 0.7452 Gm. CO 2 

 II 0.3268 Gm. gave 0.2288 H 2 O, 0.8457 Gra. COjj 



I 0.351 Gm. gave 5 Cc. N at 20 C. and 716 Mm. 

 II 0.4619 Gm. gave 69Cc. N at 18.6 C. and7i6 Mm. 



I II Mean 



C 71 808 per cent 71.51 per cent 71.659 



H 8.01 per cent 7.85 per cent 7.93 



N 1.57 percent 1.646 per cent 1.608 



Ash 0.600 



Another sample of the same substance was dissolved in 

 alcohol, a solution of sodium hydroxide added in excess, and 

 heated until the alcohol evaporated. The bulky black precipitate 

 was washed until free from alkali, then boiled with hydrochloric 

 acid which changed the color to a reddish brown. The precipitate 

 was washed until free from acid, dried, powdered and analyzed 

 with the following results: 



I 0.2436 Gm. gave 0.1718 Gm. H 2 O, 0.6411 Gm. COg 

 II 0.222 Gm. gave 0.1534 Gm. H 2 O, 0.5814 Gm. CO 8 



I 0.2876 Gm. gave 1.5 Cc. N at 2OC. and 711.5 Mm. 

 II 0.343 Gm. gave 2.0 Cc. N at 24. 5 C. and 714 Mm. 

 I II Mean 



c 71.72 71.418 71-569 



H 7.788 7.773 7.830 



N 0.49 0.560 0.525 



Ash i. 08 i. 060 1.070 



The substance insoluble in methyl alcohol and insoluble in 

 ether was heated with hydrochloric acid for four hours to remove 

 ash, but even that did not secure its complete removal. It was 

 washed until free from acid, dried and analyzed with the accom- 

 panying results: 



0.388 Gm. gave 0.2881 Gm. H 2 O, 1.0232 Gm. CO 8 



I 0.554 Gm. gave 8.4 Cc. Nat 23C. and 714 Mm.=i.6 per ct | Mean 1,68 

 II 0.457 Gm. gave 7. 6 Cc. N at 25C, and 712 Mm. =1.76 perct f percent 

 C 71.896 

 H 8.303 

 N i. 680 

 Ash 0.400 



The substance insoluble in methyl alcohol but soluble in ether 

 was spread on glass, placed in the drying oven where it dried in a 



