MICHIGAN ACADEMY OF SCIENCE. 



231 



X=growth. 

 O^no growth. 



Fungicide. 



Bowker 

 Chemical Co. 

 L. S. 

 dil. 1-40 



Time of 

 exposure 

 (in min.) 



5 



15 

 30 

 in 



Dilutions. 



1-200 1-220 1-210 1-260 1-280 1-300 1-320 1-340 



o 

 o 

 () 









 

 

 



X 

 X 



() 

 o 



X 

 X 

 X 



o 



X 

 X 

 X 

 X 



X 

 X 

 X 

 X 



Copper sulphate 

 coefficient. For 

 copper sulphate 

 figures see last 

 series in tables. 



220 260 



5 25 



=29.2 



Dow 



Chemical Co. 

 L. S. 

 dil. 1-40 



5 



15 

 30 

 45 



O 

 O 

 O 

 O 



X 



o 







o 



X 

 X 



o 

 o 



X 

 X 



o 



o 



X 

 X 

 X 

 X 



X 

 X 

 X 

 X 



200 260 

 5 25 



=25.2 



Graselli 

 Chemical Co. 

 L. S. 

 dil. 1-40 



5 

 15 



30 

 45 



O 

 

 O 

 O 



O 

 O 

 O 

 



X 



o 

 o 

 o 



X 



o 

 o 

 o 



X 

 X 



o 







X 

 X 

 



o 



X 

 X 

 X 

 



X 

 X 

 X 

 X 



240 320 



— + 



5 25 



=30.4 



Thomsen 



Chemical Co. 

 L. S. 

 dil. 1-40 



5 

 15 



30 



O 

 O 

 o 

 () 







o 

 o 



o 



X 



o 

 o 

 () 



X 

 X 

 X 







X X 



X X 



X X 



() 



X 

 X 

 X 

 X 



220 300 

 5 25 



= 28 



Sherwin & Williams 5 O X X X X X 



Chemical Co. i.-ii O O X X X X 



L. S. 30 O O O O O X 



dil. 1-40 45 O O O X 



X 

 X 

 X 

 X 



200 280 



+ 



5 25 



=25.6 



Blanchard 

 Chemical Co. 

 L. S. 

 dil. 1-40 



South Haven 

 Chemical Co. 

 L. S. 

 dil. 1-40 



5 

 15 

 30 

 45 



5 

 15 

 30 

 45 





 O 

 

 



O 

 O 

 O 

 O 



O 

 O 

 O 

 O 



O 

 O 

 O 

 O 



X 

 X 



o 

 o 



X 







o 







X 

 X 

 X 

 



X 

 X 



o 

 o 



X 

 X 

 X 



o 



X 

 X 

 X 



o 



X 

 X 

 X 



o 



X 

 X 

 X 

 X 



X 

 X 

 X 

 X 



X 

 X 

 X 

 X 



220 300 

 5 25 



2 

 220 280 

 5 25 



=28 



=27.6 



Ammoniacal 

 Copper Carbonate 

 lOOx standard 



5 



15 



.'JO 

 45 



Dilutions of Copper Sulphate. 

 1-5 1-10 1-15 1-20 1-30 1-40 1-50 



O 

 O 

 O 

 



O 



o 

 o 











o 

 o 







o 

 () 

 o 







X 



o 

 o 

 o 



X 

 X 



o 

 o 



X 

 X 

 X 



o 



1-60 



X 

 X 

 X 

 X 



Copper sulphate 

 coefficient. 



20 50 



+ 



5 25 



=3.0 



Neutral 5 O X X X X 



Copper Acetate 15 O X X X X 



Saturated 30 O O X X X 



Solution 45 O O O X X 



5 10 



+ 



5 25 



= .7 



Copper Sulphate 

 Standard 

 10% solution 



Copper Sulphate Dilutions. 

 1-5 1-10 1-15 1-20 1-25 1-30 1-35 



