of Atmospheric Nitrogen and Oxygen by Water. 89 



a way as to exclude all trace of air. The tubes were then 

 placed in a thermostat until the water in them was at the 

 same temperature as that of the thermostat. The corks were 

 then removed, 50 c.c. water withdrawn, and the water 

 remaining in the tubes exposed to the air for periods of 

 different length, and the air-content determined at the end 

 of the exposure. The initial air-content of the de-aerated 

 water having been previously determined, the data for 

 calculating the rate of solution were then available. 



The results of the experiments are given in Tables I. 

 and II. 



Table I. 



Experiments with columns of tap-water. 

 Temperature, 15° C. 



Area 



Vol. of 



Time of 



Amount 



of air 

 absorbed. 



Degree of 

 aeration in 



Value of 



exposed. 



water. 



exposure. 



per cent, of 

 saturation. 



" b " const. 







hours 







13-8 





12-56 



260 



23-5 



316 



45-4 



•019 



1256 



260 



48 



55 3 



691 



•021 



12-88 



260 



70 



63-4 



771 



•019 



12-88 



260 



93 



716 



83-6 



•018 



12-56 



251 



120 



75-8 



891 



•018 



]2-56 



260 



141-5 



79-7 



921 



•017 



Mean 12-62 



258 











Table II. 



Experiments with columns of sea-water 

 Temperature, 15° 0. 













137 





12-56 



268 



21-5 



28-8 



42-5 



•019 



12-25 



255 



24-0 



413 



58-3 



•029 



12-88 



270 



24 



42-2 



56-1 



•02S 



12-88 



270 



44 



60-8 



77-0 



•029 



12-88 



270 



72 



704 



86-5 



•025 



1225 



251 



96 



74-6 



900 



•022 



12-88 



260 



96 



75-5 



91-8 



•024 



12-56 



255 



118 



79-5 



961 



•026 



12-88 



258 



168 



82-9 



99-3 



■028 



Mean 1267 



262 











