THE SPRING AND SUMMER OF i8g4 



507 



the surface. It was evident that these accumulations of 

 diatoms and alga remained floating exactly at the depth 

 where the upper stratum of fresh water rests on the sea- 



BLESSING FISHING FOR ALG.« 



{From a P/wtogra/'h) 



water. The water on the surface was entirely fresh, and 

 the masses of diatoms sank in it, but floated on reaching 

 the salt-water below. 



"Thursday, July 19th. It is as I expected. I am 

 beginning to know the ways of the wind up here pretty 



