454 



Eighth Annual REroRT of the 



At Itliaea, in the Central Lake Region, the night wind usually 

 commences from one to two hours after sunset, blowing from the 

 south down the channels of the two principal streams flowing 

 into Cayuga lake. At first a light breeze, it increases in force 

 during the night and attains a maximum velocity probably not 

 less than eight miles per hour. The current in <the main valley 

 at the head of the lake (as observed by means of small balloons) 

 is from 50 to 100 feet in diepth before midnight, and no doubt 

 becomesi greater before morning. This volume of cold air grad- 

 ually increases until sufficient to 'overcome the heating effect of 

 the lake waters, reaching the northern extremity of the valley 

 toward morning. 



The essential features of the night wind, as thus outlined, are 

 common to all highland districts, although the contour of the 

 land surfaces near Ithaca (and also the presence of the lake) give 

 it rather unusual strength. As an additional instance, the case 

 of Utica may be mentioned; the phenomenon being there more 

 marked than would at first be expected from the character of the 

 surrounding countr3^ The relief map accompanying this report 

 shows the valley to open both eastward amd iwestward from 

 Utica; the highlands, however, rising mainly towards the north- 

 east and southeast of the city.' The following observations upon 

 the winds during the winters and summers of two years were 

 found in the report of the Board of Regents (second series). 



