CALCIUM ARSENATES AND ARSENITES. 



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Fig. 13. — Safety lines for spraying with commercial calcium arsenate in clear 

 weather: 1, pear; 2, elm; 3, apple; 4, cherry; 5, plum; 6, peach. 



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Fia. 14. — Safety lines for spraying with commercial calcium arsenate in cloudy 

 weather: 1, pear; 2, elm; 3, apple; 4, cherry; 5, peach; 6, plum. 



