I9I9] 



HAAS— RES P IRA TION 



399 



(with certain exceptions to be mentioned) the color of the indicator 

 was reversible by this means. This showed conclusively that the 

 increased acidity was actually due to CO2. In the case of sea 

 water containing 0.3 per cent chloroform, the color of the indicator 



TABLE IV D 



Two PERIODS (37.5 MIN. EACh) IN SEA WATER FOLLOWED BY 6 EQUAL PERIODS IN 

 SEA WATER CONTAINING $ PER CENT ETHYL ALCOHOL 



Solution 



Sea water 



Sea water containing 5 per cent 



ethyl alcohol 



Sea water containing 5 per cent 



ethyl alcohol 



Sea water containing 5 per cent 



ethyl alcohol 



Sea water containing 5 per cent 



ethyl alcohol 



Sea water containing 5 per cent 



ethyl alcohol 



Sea water containing 5 per cent 



ethyl alcohol 



Change in PH 



43=0.22 

 95=0.70 

 95=0.70 

 22=0.43 

 25=0.40 

 25=0.40 

 25=0.40 



Relative rate of respiration 



O. 70-i-0.22 = 3. 2 



o. 70^0. 22 = 3.2 



0.43^0.22 = 1.9 

 0.40-7-0.22 = 1 .8 



0.40-7-0. 22 = 1.8 

 O. 40 = 0.22 = 1.8 



TABLE IV E 



Two PERIODS (39.25 MIN. E.'iCH) IN SEA WATER FOLLOWED BY 4 EQUAL PERIODS IN 

 SEA WATER CONTAINING 2 PER CENT ETHYL ALCOHOL 



Solution 



Change in PH 



Relative rate of respiration 



Sea water . 



Sea water containing 2 per cent 



ethyl alcohol 



Sea water containing 2 per cent 



ethyl alcohol 



Sea water containing 2 per cent 



ethyl alcohol 



Sea water containing 2 per cent 



ethyl alcohol 



765-7.35 = 0.30 

 •35 = 0.30 



65-7 

 .65-7 

 65-7 

 65-7 

 65-7 



20 = 0.45 

 28 = 0.37 

 43 = 0.22 

 52 = 0.13 



0-45 -^0.30=1. 5 

 0-37-^0.30=1.2 

 0.22^0.30 = 0. 73 

 0.13-7-0.30 = 0.43 



was not reversible at the end of the first period, although after any 

 of the succeeding periods the color was fully reversible. The color 

 of the indicator in sea water containing 17.4 per cent acetone (made 

 up to the conductivity of sea water) was not reversible at the end of 

 the first period of exposure. At the end of the second period of 



