~ about 700 pages each; and the additions to the last editiow’ 
Basa 
ie 
# f Dr. Webster’s Text Book. 
but one having been reprinted in this country, the last Ameri- 
can edition, published in Philadelphia, is in three volumes 
Dr. Henry’s work has been very generally studied, and is 
used as a text book in some of our literary institutions; but 
it is now more properly to be considered a system of chemis- 
try, than an elementary work, and takes its place by the side 
is 
it is extremely valuable to the professed chemist, is yet unne- 
essary the beginner. A work was obviously wanted, 
which should contain all the elements of the science, and be 
less extensive than Henry, but more so than Brande, who is 
much too concise; and such a work is this of Dr. Webster. 
A detailed knowledge of chemistry cannot be attained by 
every one. ‘The science is more grand and extensive in its 
outline, than is generally supposed. The extent of its ob- 
Jects is apt to be overlooked in the attention to its manipula- 
tions and minuter details. It has rapidly grown up into an 
extensive aceumulation of facts, to which additions are mak- 
ing ost daily from almost all parts of the globe. — It re- 
of expensive and delicate instruments, such an acqui+ 
of manual dexterity, and so much thought and atten- 
tion, for its successful prosecution, as must confine its 
uit to a few professors and enthusiastic amateurs. But 
