49 



inhibited germination no granular appearance of the proto- 

 plasm such as was found in physiologically similar sol- 

 utions of Cu(R03)o was evident. Yet it is clear that 

 the lead salt either directly or indirectly affects the 

 protoplasm through the spore wall, as is shown by the 

 formation of the dark bodies occupying one half of the 

 spore in many cases. This rSsponse was observed, as has 

 been mentioned, in the higher concentrations of the lead 

 salt, A discussion of the different forms of germination 

 V7ill be taken up below, after the effects of the comb- 

 inations of calcium and magnesium nitrates with the 

 other salts have been discussed. 



