Imrnunity of Lower Organisms to Ethyl Alcohol Gcg 



A considerable difference was seen between the action of methyl 

 alcohol and that of glycerin upon the color and cilia of the frontal 

 field. Both color and ciliary activity of this region were long re- 

 tained in methyl alcohol while in the glycerin both were lost at a 

 comparatively early time. 



2 Effects upon Resistance 



In Stentor and Spirostomum, the comparative resistance for 

 both normal and acclimatized animals is shown in Experiment 

 XIX which follows. In this Stentor was tested to an 8 per cent 

 concentration and Spirostomum to a lo per cent solution of methyl 

 alcohol. 



Experiment XIX. 



RESISTANCE OF STENTOR AND SPIROSTOMUM TO METHYL ALCOHOL, AFTER LIVING IN I PER CENT 



ETHYL ALCOHOL 



a Stentor 

 Tested to 8 Per Cent CHgOH 



A C 



Acclimatized to Control 

 I per cent Ethyl 



Alcohol 



Seconds 



Exp. 



1 01 



2 C 



3 ci 



4 c: 



5 c 



6 c 



7 c 



8 c 

 9c: 



lia stop 480 



lia stop 240 



lia stop 180 



lia stop 270 



lia stop 120 



lia stop 210 



lia stop 180 



lia stop 360 



lia stop 180 



lia stop 180 



Seconds 

 240 

 360 

 240 

 105 

 270 

 360 

 300 

 270 

 180 

 270 



b Spirostomum 

 Tested to 10 Per Cent CH3OH 



A C 



Acclimatized to Control 

 J per cent Ethyl 

 Alcohol 

 Seconds 

 Exp. I cilia stop 25 



2 cilia stop 50 



3 cilia stop 20 



4 cilia stop 45 



5 cilia stop 70 



6 cilia stop 35 



7 cilia stop 25 



8 cilia stop 30 



9 cilia stop 60 



10 cilia stop 45 



Seconds 



35 

 30 



30 

 80 

 40 

 60 

 30 

 50 

 65 



240 



259-5 



40.5 



44-5 



Thus remaining in ethyl alcohol did not increase the resistance 

 to methyl alcohol. In both animals, indeed, the resistance to the 

 methyl alcohol was slightly decreased by previous subjection to 

 ethyl alcohol. The immunity due to the latter is in this case also 

 specific. 



