Protessor Johnston s Works continued. 



ELEMENTS OF AGRICULTURAL CHEMISTRY AND 



GEOLOGY. A New Edition, greatly enlarged, price 6s. 



&quot; The style is delightfully clear, the facts important, and brought to bear on the daily 

 business of the farmer s life with startling effect. &quot; Britannia. 



&quot; Nothing hitherto published has at all equalled it, both as regards true science and 

 sound common sense.&quot; Quarterly Journal of Agriculture. 



&quot; Of all the different works which have lately been published on the Chemistry of 

 Agriculture, that now before us appears to be most likely to be of real service to the 

 practical man.&quot; Gardener s Magazine,. 



A CATECHISM OF AGRICULTURAL CHEMISTRY AND 



GEOLOGY. A New Edition, being the 27th, entirely re-written, 

 price Is. 



&quot; We would recommend every farmer in Britain, let his knowledge of agriculture be 

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 mendation 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 ; while the uninitiated, 

 unaware of the science of agricultural chemistry, by a simple perusal will be able to dis 

 cover it clearly, and mould its principles to obtain the highest advantage to themselves.&quot; 

 Scientific Agriculturist. 



&quot; La lecture de ce petit livre donnera, nous en sommes certains, a plus d un lecteur 

 pratique, des inductions qui lui feront appercevoir la cause des mecomptes et des succes 

 e prouve s en agriculture ; resultats trop souvents attribues par 1 aveugle routine an hasard 

 ou a des circonstances tout a fait e&quot;trangeres.&quot; French Translation. 



ON THE USE OF LIME IN AGRICULTURE. In One 



Volume foolscap 8vo, price 6s. 



&quot; Its title indicates its importance. Everything that can be said of lime as a manure 

 is stated, not at random or hearsay, but according to tests made with chemical certitude, 

 and verified by productive .results. It is a great addition to the art of preparing and 

 using one of the best and most universally appropriate of artificial manures.&quot; Bell s Life. 



CONTRIBUTIONS TO SCIENTIFIC AGRICULTURE. 8vo, 



price 6s. 6d. 



THE POTATO DISEASE IN -SCOTLAND IN 1845-6. 8vo, 



price 4s. 6d. 



INSTRUCTIONS FOR THE ANALYSIS OF SOILS. 8vo, 



price Is. 



