403 



The percentages of carbonic acid in the atmosphere have 

 not been determined, as they certainly ought to be, along with 

 the tensions, but we may feel sure that they were distinctly 

 higher than these and that a copious absorption of carbonic acid 

 took place in a very considerable area of the North- Atlantic 

 and Davis-Strait during the first half of September 1903. 



It cannot be gathered, of course, from this single series 

 of tension-determinations whether such will prove to be of direct 

 hydrographie value, but it appears to me that they will deserve 

 a fair trial in this respect. 



26* 



