-— Bivtidlldiphy. 
of other orders. There follow most important chapters on manure, 
the composition of animal manure, the essential elements of manure, 
bone manure, the supply ef nitrogen by animal manures, mode of ap- 
plying urine, value of human excrements, which, with some conclu- 
ding remarks, finish the first part of this unique volume. We must 
here conclude our remarks, without attempting the least analysis of 
the second part, which is devoted to a discussion on the chemical pro- 
cesses of fermentation, decay, and putrefaction. 
To some, the style of this work may seem somewhat obscure; but 
it will be found, on a re-perusal, that great condensation, brevity and 
terseness have been mistaken for obscurity. It presupposes a good 
degree of chemical knowledge on the part of the reader, and for that 
reason needs elucidation by notes, for the advantage of those who do 
not possess that knowledge. But we can truly say, that we have never 
risen from the perusal of a book with a more thorough conviction of 
the profound knowledge, extensive reading, and practical research of 
its author, and of the invincible power and importance of its reason- 
ings and conclusions, than we have gained from the present volume. 
13. Report on the Geological and Agricultural Survey of the State 
of Rhode Island, in 1839; by Dr. Cuartzs T. Jackson, Mem. Geol. 
Soc. of France, &c. Providence, 1840. B. Cranston & Co. 
1. Some notice of the Geological portion of Dr. Jackson’s Report. 
The labors of Dr. Jackson in other years have been favorably no- 
ticed in our reviews of his reports on the geology of Maine and Mas- 
sachusetts in previous volumes of this Journal. The territory which 
is the subject of the present memoir, is the smallest but one, of the 
twenty six states of our federal union, and we cannot therefore eX- 
pect to find in it all that variety which characterized the reports of 
the same author previously alluded to. This report is naturally divi- 
ded into two parts, the geological and the agricultural. We will be- 
gin with the consideration of the former. 
It is introduced by a sketch of scientific geology, which, with offi- 
cial correspondence, occupies 45 pages ; the general and local geology 
of the State fills 140 pages; the account of the analysis of soils a 
manures, 64; the farm reports, 40: there are fourteen wood cuts ™ 
the text, seven in distinct pages, a folded geological map of the State, 
colored for the formations, and a second folded sheet containing four 
colored cross sections; besides ample tables, exhibiting in a conde?* 
ed form the results of the analyses of soils.* 
* The typography is good, and the paper white, but far too thin,—a common fault 
with American books, especially as the paper is made chiefly of cotton. 
‘igs. 
