on the Geology of New Hampshire. 37 
yield, and this without additional expense. We therefore feel the 
importance of diffusing just such information as this article on 
Metallurgy gives. We have in it an account of the various ores in 
the State, the methods of reducing them to a metallic state, their 
analysis, their yield, the best fluxes for their reduction, the prob- 
able cost in particular cases, together with full descriptions of the 
best kinds of furnaces in use, and plates explanatory. We have 
likewise the expenses of transportation from the ore beds to the 
markets, and the value of the product in such markets. Impor- 
tant information too is furnished in relation to the working of 
mines abroad, and valuable hints thrown out upon the subject of 
working some ores in this country that have hitherto been neg- 
lected. 
Agricultural Geology and Chemistry. 
Our proposed limits will not permit of more than a very brief 
notice of this portion of the work under consideration. It con- 
tains an account of the origin and distribution of soils; of the 
origin of organic matters in soils; of peat and swamp muck; of 
the analysis of peat and the action of alkaline salts upon it; of 
the origin of saline matters in soils and plants, and of the relative 
proportion of starch, of oil and of gluten in grains. Remarks are 
made on the improvement of soils, and the uses in agriculture of 
salt, nitre, the phosphates and sulphates. Agricultural observations 
upon some of the best farms in the State are added, and m 
more matter in relation to the subject, which is well worth the 
attentive perusal of those interest 
In the appendix we have barometrical and thermometrical ob- 
servations made in different parts of the State for the measure- 
ment of heights; also barometrical registers, with other matter 
more particularly interesting to the scientific, and annexed we 
have some sectional profile views of the rocks from point to point, 
with a geological map of the State. 
In conclusion, we will express the hope that Dr. Jackson will 
at some not very future period, present us with a connected ac- 
count of his observations, not only upon the geology of the States 
surveyed by him, but also upon that of the provinces north, as 
we are sure he might do this to much advantage, with but lite 
additional labor in the field. 
