I9I9] 



HAAS—RESPIRA TION 



397 



activity. Furthermore, there is a maximum increase which is 

 usually reached in the first, but sometimes not until the second 

 period. The relative amount and relative rate of respiration in- 

 crease with increasing concentrations of ethyl alcohol up to 10 



TABLE IV B 



Two PERIODS (28 MIN. EACh) IN SEA WATER FOLLOWED BY 8 EQUAL PERIODS IN 

 SEA WATER CONTAINING 1 6. 1 PER CENT ETHYL ALCOHOL 



Solution 

 Sea water 



Sea water containing 16.1 per cent 



ethyl alcohol 



Sea water containing 16. i per cent 



ethyl alcohol 



Sea water containing 16. i per cent 



ethyl alcohol 



Sea water containing 16. i per cent 



ethyl alcohol 



Sea water containing 16. i per cent 



ethyl alcohol 



Sea water containing 16. i per cent 



ethyl alcohol 



Sea water containing 16. i per cent 



ethyl alcohol 



Sea water containing 16.1 per cent 



ethvl alcohol 



Change in PH 



Relative rate of respiration 



9S-7-50 = o-45 

 95-7-52=0.43 



95-6 



95-6 



95-6 



95-7 



95-7 



95-7 



95-7 



95-7 



76=1.19 

 55 = 140 

 75 = 1.20 

 20 = 0.75 

 57 = 0.38 

 70 = 0.25 

 85=0. 10 

 90 = 0.05 



i.i9-=-o.44=2.7 

 1.4 -=-0.44 = 3.2 

 1.2 -^0.44=2.7 



0.75-^0.44=1.7 

 0.38-^0.44 = 0.86 

 o.25-^o.44 = o.57 

 o. 10 -^ 0.44 = 0. 23 

 0.05-4-0.44 = 0. II 



TABLE IV B CONTROL 

 Nine periods (28.5 mix. each) in sea water 



Period 



I 



2 



3 

 4 



5 

 6 



■7 

 8 



9 



Change in PH 



Relative rate of respiration 



per cent. At concentrations from 2 to 10 per cent the relative rate 

 of respiration remained far above the normal during the entire 

 experiment. When larger concentrations such as 16. i or 24 per 

 cent are used, however, the decline, once the maximum rate has 

 been reached, becomes more, rapid with increasing concentrations 



