BY THE SAME AUTHOR. 



AGRICULTURAL BOTANY : Theoretical 



and Practical. By JOHN PERCIVAL, M.A., F.L.S. 

 With 265 Illustrations. Sixth Edition, Revised 

 1921, Large Crown 8vo. i8s. net. 



AGRICULTURAL BACTERIOLOGY: 



Theoretical and Practical. By JOHN PERCIVAL, 

 M.A., F.L.S. With 59 Illustrations. Large 

 Crown 8vo. I2s. 6d. net. 



