440 Miscellaneou# Bibliography. 
we are acquainted, and it is eminently practical in the arrangement and 
treatment of the topics embraced. It is divided into three parts, the first 
treating of the origin, varieties and chemical characters of peat ; the sec- 
the work (p. 77), it is sufficient to state the following as among the re- 
sults; that the admixture of ashes, carbonate of lime, slacked lime, and 
Peruvian guano, tended to greatly increase the amount of plant food in 
decomposing peat, the crops in extreme cases being augmented thirteen 
fold over the production from pure peat, and, without any admixture con- 
taining nitrogen, eleven fold, 
_ In regard to its value for fuel, a subject now attracting so much atten- 
tion, we have here data afforded by the various processes engaged in its 
preparation in this country and in Europe. The great question of its prof- 
-itableness now remains to be solved by the many experimenters in this 
branch of industry, many of whom need the data and facts here brought 
together for a more intelligent direction of their. labors. This is espe- 
cially the case, as regards the comparative heating effects of peat and coal, 
upon which popular opinion is so erroneous, W. H. B. 
8. Recherches sur lorigine des Roches, par Devesse, Ingénieur en 
chef des Mines, &c. 74 pp. 8vo. Paris, 1865. (F. Savy.) —Delesse has 
written much upon the origin of rocks, and whatever comes from his pen 
is 
r 
9. Geology and Minerals: a report of Explorations in the Mineral 
Regions of Minnesota during the years 1848, 1859 and 1864, by Col. 
Cuartss Warrriesey. 54 pp. 8vo. Cleveland, 1866. Printed by order 
of the General Assembly — We barely announce this memoir, as one con- 
taining many facts of value on the subjects of the surface features of the | 
region mentioned, the phenomena of drift, and the distribution and fea- : 
tures of some of the rocks. 
10. Carte Géologique du Department de la Seine, publiée d’apres les 
orders de M. LeBaron G. E. Haussmann, Senateur Préfet de la Seine, 
conformément a la déliberation de la Commission departmentale et ex 
eutée sur la carte topographique, gravée sons la direction de M. ’inge- 
