Chemical Papers. 



49 



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1 \ \ 11 I 1 i \ \ 



1 \ I — \~T 



0: 



Ax 

 C 



Cx 



r^ 



t □ a. 



IZbzL 



3 i: 



-n_n. 



3 I . L 



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1 c 



jz£ 



1 d 



ruzi: 



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Graphic representation of daily division rates of cultures, showing com- 

 parison between the chemically stimulated and the normal hay-fed series. 



A, Ax, C, Cx, are the "NaCl continued stimulation series." Of these 

 A^and C are the check cultures, while Ax and Cx are the cultures stimu- 

 lated continually with one per cent. NaCl. X marks the day on which death 

 occurred. 



Ci is the check series for NaCh, NaCl2, Cui, and Cu2. NaCh and NaCh 

 cultures were stimulated twice with one per cent. NaCl for periods of 

 twenty-five minutes each. Cui and Cu2 cultures were stimulated twice with 

 a weak solution of curare for periods of twenty minutes each. 



D and Dm are the " MgCh comparative series." D is the check culture, 

 while Dm has been stimulated once with one per cent. MgCb for twenty 

 minutes. 



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