CHEMISTRY OF NITROGLYCERINE. 



71 



IV. Nitroglycerine, A. — Same as II., except that caustic soda was used 

 instead of caustic potash. The decomposition presented the same 

 appearances as when potash was used. 



The yield of nitrous anhydride was 35 24 per cent. 



V. Nitroglycerine, A. — Same as II., but no heat applied, and fluid freely 

 diluted with water two minutes after the addition of the potash. 

 The yield of nitrous anhydride was 33 04 per cent. 



VI. Nitroglycerine, B. — 1 grm. dissolved in- about 6 c.c. of alcohol, and 

 heated with 12 c.c. of 12| per cent, alcoholic solution of caustic 

 potash. Boiled over water-bath to dissipate the alcohol, water 

 being added to replace the alcohol. 



The yield of nitrous anhydride was 34*96 per cent. 



VII. Nitroglycerine, D. — 1 grm. dissolved in 15 c.c, of alcohol, and heated 

 with excess of potash solution. 



The yield of nitrous anhydride was 34*41 per cent. Another 

 estimation gave 34*96 per cent. 



VIII. Nitroglycerine, F. — Same proportions of nitroglycerine and alkali 

 as in VII. 



The yield of nitrous anhydride was 34*96 per cent. 



IX. Nitroglycerine, G. — Same proportions as VII. 



The yield of nitrous anhydride was 35*24 per cent. 



X. Nitroglycerine, G. — Same proportions as IX. 



The yield of nitrous anhydride was 34*96 per cent. 



XL Nitroglycerine, N. — Same proportions as X. 



The yield of nitrous anhydride was 35*24 per cent. 



XII. Nitroglycerine (from Nobel's dynamite). — Same proportions as X. 

 The yield of nitrous anhydride was 35*24 per cent. 



Summary of Estimations of Nitrous Acid in the Alkaline Decomposition- 

 Products of Nitroglycerine. 





























No. of Analysis. 



1. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



IX. 



X. 



XI. 



XII. 



Specimen 



of 



Nitroglycerine. 



A 



A 



A 



A 



A 



B 



D 



F 



G 



G 



N 



Dyna- 

 mite. 



Percentage of 



Nitrous 

 Anhydride. 



34143 



35-24 



35-24 



3524 



33-04 



34-96 



34-41 



34-96 



35-24 



34-96 



35-24 



35-24 



