f 



By THE SAME AUTHOR 



INSECTS AND INSECTICIDES 



A Practical Manual Concerning Noxious Insects and the 

 Methods of Preventing their Injuries. Profusely Illus- 

 trated, 280 pages, handsomely bound in cloth with em- 

 bossed cover. Price, #1. 25. 



SPRAYING CROPS 



Why, When and How. Illustrated. Second (Revised) Edi- 

 tion. Seventh Thousand. 130 pages. Price, 25 cents. 



Copyright, 1894, by ORANGE JUDD COMPANY 



