402 



jaggar: thermal gradient at kilauea 



surface and making only thin skins; on May 2 this pool was 

 partially separated from the larger lake and tended to form thick 

 stagnant crusts. This surface was therefore much cooler on 

 May 2, in accordance with the tendency of the B curve. A 



table 2 



Group 2. Upper Lake Gradient (crosses) 



solid-line curve has been drawn in the diagram intermediate be- 

 tween the two, and this line is not far from a correct expression 

 of the temperature of the Kilauea pool at its eastern margins, 



