o 



PREFACE. 



So great is the annual loss from the ravages of injurious insects 



that it seems as though the methods of prevention should be taught 



in every school. 



•J The aim of the author has been to prepare a concise and 



M practical treatise that may be used in schools where time is 



^ limited, and that can be published at a price within the reach 



of all. 



w 



£_| Chicago Lawn, III., 



N. M. E. 



December 1, 1888. 



