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or: By James w. f. Johnston F r s. SC. Wiley


& Pu,nsm, New-York.


We here have the complete Lectures OF Pfol.
Johnston on Agricultural Chemistry in four
cheap paper-covcred volumes or Parts, divided as
follows:


Pa. l. On the Organic Constituents of Plants;


'' II. On the Inorganic Elements of Plants;


q III On the Improvement Of the Soil by Mechanical


Means and by Alanures;


Appendix. Suggestions for Experiments in Practical Ag


riculture and Results


These four volumes comprise 84l wel-printed
Dsges Of information for practical farmers, care
fully prepared by one Of the best scientific explo-
rers of the realm and laws of Nature with view
10 Improvement in Agriculture. No farmer can
study and be guided by these works without de-
1ynr immediate and signal advantage there
from. Prof .Jollnston's opinions are fortified by
frequent references to practical experiments and
TO the judgements of the best Agricultursts Of
Europe The whole costs only 5l.l6, and CO.
py ought to be promptly purchasedin every Agri-
cultural neighborhood or school district, at least.