PICKERING SPRAYS. 47 



(21) Pickering, S. U. 



Copper fungicides. J. Agr. Sci., vol. 4, pp. 273-281. Jan., 1912. . 



(22) Sicard, L. 



Etude de la composition et de la preparation de la bouillie bordelaise. Ann. 

 Ecole Nat. Agr. Montpellier, vol. 14 (new ser.), pp. 212-253. Jan., 1915. 



(23) Swingle, W. T. 



Bordeaux mixture. TJ. S. Dept, Agr., Div. Veg. Physiol. Path. Bull. 9. 1896. 



(24) Vermorel, V., and Dantony, E. 



Sur la composition chimique des bouillies bordelaises alcalines et sur le cuivre 

 soluble qu'elles renferment. Compt. rend., vol. 159, pp. 266-8. July, 1914. 



(25) Young, S. W., and Stearn, A. E. 



The basic copper sulfates. J. Am. Chem. Soc, vol. 38, pp. 1947-1953. 

 Oct., 1916. 



ADDITIONAL COPIES 



OF THIS PUBLICATION MAY BE PROCURED FROM 



THE SUPERINTENDENT OF DOCUMENTS 



GOVERNMENT PRINTING OFFICE 



WASHINGTON, D. C. 



AT 



10 CENTS PER COPY 

 V 



