Books on Economic Entomology 



Catalogue No. 4 



Ready in October, will present titles of interest to 

 economic entomologists in unusual detail. 



Catalogue No. 3 



78 pages, and No. 4, which will be even larger, are 

 both devoted exclusively to books on Insects. 



Send your name and coned present address to 



JOHN D. SHERMAN, Jr. 



24 Claremont Ave. Mount Vernon New York 



ORCHARD BRAND 



SPRAY MATERIALS 



STANDARD OF QUALITY :: MAXIMUM OF EFFICIENCY 



B T S* Atomic Sulphur 

 Lime Sulphur Solution Bordeaux Mixture 

 Arsenate of Lead, Dry or Paste Bordeaux Lead 

 Arsenite of Zinc, Dry or Paste Bordeaux Zinc 

 Arsenate of Lime, Powder 



* B T S is a dry Barium Sulphur Compound and is a complete substitute 

 for Lime Sulphur Solution. 



Manufactured by 



THOMSEN CHEMICAL COMPANY 

 BALTIMORE, MARYLAND 



G. R. CusHHAN, Manager W. M. Scott, EntomolooUt and Pathologxti 



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