120 MOHR AND REDWOOD'S PRACTTCAL PHARMACY 
This apparatus may also be applied in the process of ex- 
traction with spirit ; but in this case it is necessary to apply 
more heat, by using a solution of chloride of calcium or a 
sand-bath. 
If the principle of this apparatus were carried out on the 
large scale, and a metallic vessel employed instead of the 
glass bottle, the exhaustion of sabadilla-seeds, and even of 
bark, for the preparation of the alkaloids, might, no doubt, 
be accomplished with the smallest possible loss of alcohol. 
ART. XXVII. — PRACTICAL PHARMACY : the arrangements, appa- 
ratus, and manipulations of the Pharmaceutical Shop and Labora- 
tory. By Francis Mohr, Ph. D. Assessor Pharmacise of the Royal 
Prussian College of Medicine, Coblentz, and Theophilus Redwood, 
Professor of Chemistry and Pharmacy in the Pharmaceutical Society 
of Great Britain. American Edition, with numerous additions and 
over five hundred wood cuts. By William Procter, Jr., Professor 
of Pharmacy in the Philadelphia College of Pharmacy. Lea & 
Blanchard, 1849. pp. 550. 
[The want of a treatise on practical pharmacy, devoted 
to apparatus and manipulations, has long been a dissideratum 
both in England and the United States ; it is therefore with 
pleasure that we call the attention of our readers to the work 
of Mohr& Redwood, which has just been issued by Messsrs. 
Lea & Blanchard. The book has been received too late to 
give it now the examination it merits, which we promise 
shall be done in our next number ; in lieu, however, we 
present a few extracts from the work which will give some 
idea of its character. — Editors.] 
" Fig 14 represents a useful kind of stove, which may be 
fixed in the fire place either of the shop, or more con • 
veniently of a room adjoining the shop, it consists of a 
chemical furnace, drying closet, and boiler for the supply of 
