TOBACCO, TOBACCO-PIPES AND SMOKING

A. S. G.
1900 Science  
The same evening two papers were read by A. Scott, one on the preparation of pure hydrobromic acid in which the employment of sulfurous acid is recommended in the place of amorphous phosphorus. It is very difficult to free the phosphorus completely from chlorin, and arsenic is almost always present, which gives rise to arsenious bromid in the hydrobromic acid and arsenites and arsenates in the bromids made from this acid. When sulfurous acid is used, the hydrobromic acid is easily freed from
more » ... asily freed from the sulfuric acid formed by two or three distillations, the last over barium bromid.
doi:10.1126/science.11.277.633 pmid:17810223 fatcat:3nakrokrgbhibpbl4jbfitlj2y