20 AGRICULTURE. 



An Entirely New Edition. 



Johnston's 

 Elements of Agricultural Chemistry. 



From the Edition by Sir CHAELES A. CAMERON, 

 M.D., F.R.C.S.I. Revised and brought down to date 

 by C. M. AIRMAN, B.Sc. 



Crown 8vo, 6a. {Just ready. 



An Entirely New Edition. 



Johnston's 

 Catechism of Agricultural Chemistry. 



From the Edition by Sir C. A. CAMERON. Revised 

 and Enlarged by C. M. AIKMAN. With numerous 

 Illustrations. 



Crown 8vo, Is. 



Manchester Courier. — "If every farmer in this country could 

 be induced to read carefully this little book, and put the knowledge 

 obtained thereby to practical tests, we venture to assert that there 

 would be fewer complaints respecting the unproductiveness of the 

 land and the difficulty in making a farm pay." 



Farmyard Manure: 



Its Nature, Composition, and Treatment. By C. 

 M. AIKMAN, M.A., B.Sc, &c, Lecturer on Agricul- 

 tural Chemistry, West of Scotland Technical College ; 

 Examiner in Chemistry, Glasgow University, &c 

 Crown 8vo, Is. 6d. 



Agricultural Economist.—" The little manual before us will be 

 .found of great assistance in this study. It deals exhaustively with 

 this subject, complex though it be, and says quite sufficient on every 

 point of importance to enable any one of ordinary intelligence to 

 arrive at just conclusions as to the source of value in his farmyard 

 manure." 



Manures and the Principles of Manuring. 



By C. M. AIKMAN, M.A., B.Sc. 



Crown 8vo. [Just ready. 



