CHEMICAL AND PHARMACEUTIC MANIPULATIONS. 103 
pared, may well take pride in its widely spread and increas- 
ing reputation. 
A thorough chemical and pharmaceutical education is 
now essential to the successful and reputable management 
of an apothecary's shop and drug store, and the desire for 
the best scientific aid in his profession is felt by every in- 
genuous youth who applies himself to the business. The 
work, the title of which is prefixed to this article, is one that 
ought to be in the hands of every such student of Phar- 
macy and Chemistry, and contains a variety and amount of 
information for which he will seek in vain, in the professed 
Treatises on Chemistry. The author has had in his mind 
the admirable treatise of Professor Faraday on chemical 
manipulation, and has given in a condensed form nearly all 
that is valuable for ordinary use in that work, besides much 
original matter of his own, and much collected from other 
sources ; all which he has rendered far more useful and in- 
telligible by the aid of excellent figures. We cannot better 
praise the book or more effectually recommend it to the 
notice of our readers, than by selecting a few passages more 
particularly connected with our profession. 
Gas Furnaces. 
" When coal gas can be commanded, it is far more conve- 
nient and economical, and by a particular arrangement 
may be made to yield heat enough for evaporation and 
ebullition in capsules, and the different operations of digest- 
ing in bell glasses, &c. By the use of a large Argand burner 
fixed over the jet of the table blow-pipe, Fig. 5, we can ob- 
tain the power of a blast. The admixture of the gas, in this 
way, with atmospheric air, increases the heat to such an ex- 
tent as to allow the ignition of precipitates in crucibles, and 
the almost entire dispensation of furnace fires in table opera- 
tions. The arrangement by which these results are accom- 
plished, so as to avoid entirely the deposition of carbon on 
the bottoms of the vessels, is shown by Fig, 3. B is a 
