LIST OF ILLUSTRATIONS AND 

 DIAGRAMS 



17. Diagram illustrating the differences between temperatures at 



the highest and lowest parts of the ground . " . 121 



Spencer Pickering . . . . * -. . -171 



18. Diagram of rate of settlement of Bordeaux mixtures, etc. . 180 



19. Diagram of settlement of Bordeaux mixtures prepared in 



different ways . . . . . . . .181 



20. Tree attacked by mussel scale . . . . . 197 



21. Mussel scale . . . . . . . . . 199 



22. Currant gall mite . . . . . . . .213 



Plate III Bramley Standard plot, 1905. Forking and pruning 230 



23. Stereum purpureum on plum .... . 233 



24. Diagram of organic matter in soil after heating . . .250, 



