126 



Prof. Moore, Dr. Koaf, and Mr. Whitley. 



[Oct. 9, 



Fig. 1. — Control. Growth of eggs in 

 normal sea-water. 



Fig. 3. — Growth of eggs in sea- water, 

 +0-0015 M. sodium hydrate. 



I It 



: § 9 # 



Fig. 5. — Growth of eggs in sea- water, 

 + 0-0015 M. hydrochloric acid. 



Fig. 2. — Growth of eggs in sea-water, 

 + 0-001 M. sodium hydrate. 



Fig. 4.— Growth of eggs in sea-water, 

 + 0-001 M. hydrochloric acid. 



Fig. 6.— Growth of eggs in sea-water, 

 + 0'001 M. potassium hydrate. 



