ON MERCURIAL PREPARATIONS. 
3 
to be manufactured by Farr, Powers & Wrightman, of 
Philadelphia, contained twenty-eight per cent, of mercury. 
3. A specimen imported by Morewood & Co., of this 
city, bearing the label of Davy, M'Murdo & Co., and sup- 
posed to be manufactured by them, contained thirty-four 
per cent, of mercury. This specimen appeared to be pre- 
pared with less care than any other, the mercury being less 
perfectly incorporated with the mass. 
4. A specimen imported by Edward S. Innes, about 
eight months since, bearing the label of Mander, Weaver 
& Mander. and believed to be manufactured by them, was 
found to contain thirty-three per cent, of mercury. 
5. A specimen imported by dimming & Riach, manufac- 
tured at Edinburg, was found to contain twenty-eight per 
cent, of mercury. 
6. A specimen imported by Cumming & Riach, from 
Messrs. Herrings, of London, contained thirty-two per 
cent, of mercury. 
7. A specimen obtained from Olcott, M'Kesson & Co. 
manufactured by Southwick & Prior, of this city, contained 
twenty per cent, of mercury. 
8. A specimen imported by Joseph A. Rea, of this city, 
contained twenty-six per cent, of mercury. 
9. A specimen obtained from George D. Coggeshall, 
manufactured by George C. Close, several years since, con- 
tained twenty-six per cent, of mercury. 
10. A specimen obtained from Adamson & Olliff, manu- 
factured by Southwick & Prior, contained twenty per cent, 
of mercury. 
11. A specimen obtained from Adamson & Olliff, manu- 
factured by George C. Close, within the last three months, 
contained thirty-one and a half per cent, of mercury. 
The specific gravities of these specimens of blue pill 
mass were taken in spirits of turpentine, but are not ap- 
pended, being found to give no certain indication of the 
proportion of mercury contained in them. 
