II 



SWIFTS 



Arsenate of Lead 



STANDS FOR 



Quality ^ Efficiency 



Manufactured Only By The 



MERRIMAC CHEMICAL 

 COMPANY 



BOSTON, _ _ - - MASS. 



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. Ctjbhman, Manager W. M. Scott, Entomologist and Pathologist 



Please mention the Journal of Economic Entomology when writing to advertisers. 



