CONTENTS 



Materials .... 

 Pure acid lead arsenate paste 

 Commercial lead arsenate paste 

 Commercial acid lead arsenate powder 

 Pure neutral lead arsenate paste 



Application ..... 



Adequacy of experimental methods . 



General results .... 



The effects of temperature, humidity and light 

 Pear and elm 

 Apple 

 Cherry . 

 Plum 

 Peach 



General conclusions 



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