‘Trease Ca lectin, 
From the very inception of our business we have subjected 
all our chemical supplies to searching tests for purity and 
identity. The medical and pharmaceutical professions have 
always recognized the variation in the purity of chemical 
salts, but for some inexplicable reason they have not seemed 
to fully appreciate the fact that the market abounds in . 
therapeutic drugs and galenical preparations whose medicinal 
value is conjectural. Some are practically inert, and some 
"are potent to the point of danger. 
_A short time ago a chemist bought ten conte of tincture 
of opium in which the content of morphine varied from 27 
to 22.8 per cent. He also examined three tinctures of 
g aconite, one of which was found to contain 9 per cent. os 
more aconitine than the standard — and another 20 Lo5 : 
per cent. less. neo 
S Samples of belladonna preparations: ihwed from 25 to : : : 5 
; 45 per cent. Tess of fees alk loids: than official y ‘re i. 
