COPPER, ENZYMES, AND FERTILIZATION. 95 



a given depth, D x , of the standard. Accordingly, 



_ C 1 XD 1 



L *~ D 2 ' 



Test Ci X Di Micrograms Cu. 



D2 per c.c. Eggs. 



1 10 X .50 



20.54 



2.21 



1 10 X .30 , 



1976 



1.38 

 II 10 X 2 



14-29 



1.40 



II 10 X 2 



15.27 



1. 31 



III 10 X 1.5 



13-39 



1.12 



Average = 16.65 PS*- 



2. The Shed Egg. 



Ten c.c. of the material referred to as A in section VI. were 

 treated and tested in exactly the same way. 



Test Ci X Di Micrograms Cu. 



D2 per c.c. Eggs. 



1 10 X 1 



161.25 



i-55 



I 10 X 1.5 



170-50 



2.2 

 II 10 X 1 _ 



178.50 



1.40 



II 10 X 1 00 



188.00 



i-33 



Average = I74-5 6 /"€ r - 



3. The Fertilised Egg. 



Forty c.c. from a solution of 1.2 c.c. of fertilized eggs gave the 

 following results : 



