The chemist in his laboratory, is better armed for the investigation of nature than 
if his organs of sense had been many times multiplied. He has many instruments 
at his command, each of which, like the taper, tells him of properties which ne 
i his senses nor any other of his instruments can discover ; and the further his 
arches are carried, the more willing does’ nature seem to id her secrets to 
ding and the more rapidly do his chemical senses inerease. Do you think that 
the rewards of study and patient experimental research are satel to the labora- 
€ 
reach ; you have only to employ gone minds as diligently as you labor with aay 
hands, and ultimate success is sure.’ 
_ Did our limits allow, we should be pleased to give, as spac of 
the author’s happy style of discoursing popularly on scientific subjects, 
copious extracts from different portions of these lectures ; and espe- 
cially from the sections on the relations of water to vegetable life ; on 
the source whence plants derive their carbon, nitrogen, &c. ; on the 
absorbing and excretory powers of the root ; and on the mutual trans- 
formations of lignin, starch, gum, cane-sugar, and grape-sugar ; all of 
which subjects are treated with great clearness, and with consummate 
ability. But it is unnecessary to make large extracts from a book 
which we-hope and trust will soon be in the hands of nearly all our 
readers, Considering it as unquestionably the most important contri- 
bution that has recently been made to o popular science, and as destined 
to exert an. extensively beneficial influence in this country, we shall 
not fail to notice the forthcoming per are ey eppert, from 
the press. 
10. PrincIPLEs OF. Georobe | or t aides changes of the Earth 
and its inhabitants, considered as meade of Geology; by Cuares 
Lyett, Esq., F. R. 8. Reprinted from the sixth English edition, from 
the original plates, and wood cuts, under the direction of the author. 
Boston, Hilliard, Gray & Co.: 1842. 3 vols. 12mo. 
Elements of Geology; by Cuantes Lyset, Esq., F.R.S.,&c.  Re- 
printed from the second London edition, from the original plates and 
wood cuts, under the direction of the author. Boston, Hilliard, Gray & 
Co. : 1841. 2 vols. 12mo. 
Our favorable opinion of the above productions has long since and 
repeatedly been expressed in former numbers of this Journal. Every 
geologist will be glad to find that we have now new and greatly im- 
proved editions of both, brought out in the exact form and appearance 
of the original. The principal changes are the removal from the Prin- 
ciples of the fourth book, which treated of tertiary strata, and a? ineor- 
poration of the most prominent facts in it with the Elements. ‘The two 
