22 BOOKS PUBLISHED BY 



Lectures on Agricultural Chemistry and 



GEOLOGY. By JAMES P. W. JOHNSTON, M. A., F.R.SS. L. & E., 

 F.G.S., Honorary Member of the Royal Agricultural Society, 

 Chemist to the Agricultural Chemistry Association of Scotland, 

 and Reader on Chemistry and Mineralogy in the University of 

 Durham. A New Edition in one large volume octavo, price 243. 

 This edition, besides embracing the researches of other che- 

 mists, contains the result of nearly 2000 analyses, in connexion 

 with Scientific Agriculture, made in the Laboratory of the 

 Author since the publicatioi\ of the former edition, and exhibits 

 a full view of the actual state of our knowledge upon this impor- 

 tant branch. 



"A valuable and interesting course of Lectures." — Quarterl}/ 

 Review. 



" The most complete account of Agricultural Chemistry we pos- 

 sess."— Royal Agr. Jour. 



— o — 

 By the same Author, 



Elements of Agricultural Chemistry and 



GEOLOGY. A New Edition, greatly enlarged, price os. This 

 little Work is intended to give a familiar and condensed outline 

 of the subjects treated of more fully in the Lectures. 



" This is a little book which we heartily desire to see brought 

 into general circulation in agricultural districts. Practically useful 

 while explaining first principles, and scientific without pretence, 

 it is just the work to catch and rivet the attention of the more 

 stire vvd and intelligent portion of our agricultural population. The 

 style is delightfully clear, the facts important, brought to bear on the 

 daily business of the farmer's life with startling eft'ect; and the 

 subjects broached so interesting and extensive, that the attention can 

 scarcely fail to be sufiiciently awakened to pursue the study of 

 scientific agriculture a little further." — Britannia. 



By the same Author, 



A Catechism of Agricultural Chemistry and 



GEOLOGY. A New Edition, price lOd. The Publishers make a 

 deduction when a quantity is taken for Schools, or for Distribution. 

 "We would recommend every farmer in Britain, let his knowledge 

 of agriculture be extended or" limited, to procure a copy of the 

 Catechism for himself; and this recommendation we would support 

 by the facts, that the memories of the initiated are apt to get rusty ; 

 so much so, that a little rubbing-up may be necessary ; whUe the un- 

 initiated, unaware of the science of agricultural chemistry, by a 

 simple perusal will be able to discover it clearly, and mould its 

 principles to obtain the highest advantageto themselves." — Scientific 

 Agriculturist. 



By the same Author, 



Instructions for the Analysis of Soils. 



