NUCLEATION AT BLOCK ISLAND. 



105 



ture and change of wind to north. The maxima of the i8th lags 



behind the rest, but the readings fall into step next day. 



0-Increase of sunshine on January i shows its effect on the nucleation, 



3 /4 /5 /6 /7 /8 19 20 21 2Z 23 24 25 26 27 28 29 30 31 



24 25 26 27 28 29 30 )J!tef2 3 

 FIG. 92. Graphs showing current nucleations, etc., February 21 to May 3. 



