THE AL UMNI JO URN A I 



U 



The following table gives the character of 

 these proiucts : 



The following table gives the assay of several 

 samples of Barium Dioxide : 



1. 91.6 per cent. 5. 80 percent. 



2. 76.4 " 6. 82 " 



3. 86.8 " 7. 80.4 

 4- 93-6 " 8. 79.6 



The following table gives the result of ex- 

 amination of market samples : 



The following results were obtained by evap- 

 oration of different samples : 



1. Commercial— assaying 8.8 vol., excess of 

 acid. Evaporated at low temperature with 

 constant stirring. 200 Cc. to 130 Cc. assayed 9.1 

 vol. Continued to 15 Cc. assayed .22 vol. 



2. Commercial— assaying 7.5 vol., 200 Cc. to 

 100 Cc. assayed 9.8 vol. Continued to 60 Cc. 

 assayed 9. vol. 



3. Medicinal— assaying 10.86 vol., deficiency 

 of acid. 300 Cc. to 75 Cc. gave 41.66 vol., 

 should be 43.44 vol., loss 1.78 vol. 



4. Medicinal— assaying 8.17 vol., 100 Cc. to 

 26 Cc. assayed 31.2 vol, 



5. Medicinal — assaying 9.9 vol , 200 Cc. evap- 

 orated to 15 Cc. diluted with distilled water to 

 50 Cc. assayed 25 vol., loss 14 6 vol. or about 37 

 per cent. 



6. Medicinal — assaying 9.9 vol., 200 Cc. al- 

 lowed to stand open 36 hours then evaporated 

 to 50 Cc. assayed 26.86 vol., loss 12.74 vol. or 

 about 32 per cent. 



7. Medicinal — assaying 9.9 vol., 200 Cc. evap- 

 orated quickly lo 50 Cc. assayed 34.35 vol., 

 loss 5.25 vol. or about 13 per cent. 



A reagent for Morphine. — Lamol recom- 

 mends uranium acetate as a reagent for the de- 

 tection of morphine. 0.05 Gm. of morphine 

 giving a distinct reaction. This reagent strikes 

 a red-brown color with a solution of morphine 

 disappearing on addition of an acid. The addi- 

 tion of a small amount of caustic alkali causes 

 an intense red-colored precipitate, while a large 

 excess gives rise to a yellow precipitate. A few 

 drops of the solution to be examined for mor- 

 phine is placed in a porcelain capsule, to this is 

 added an aqueous solution which contains 0.3 

 per cent, of uranium acetate and 0.2;,: of sodium 

 acetate, then evaporated to dryness. The pres- 

 ence of morphine will be shown in the brown 

 to bright yellow-colored rings in the residue, 

 while other alkaloids leave white or pale yellow 

 rings. v. C. 



