Lake Maxinkuckee, Physical and Biological Survey 



91 



May is generally a bright sunny month, most of the records 

 showing a preponderance of bright days. Many of the periods 

 marked "cloudy" in 1901, were bright and pleasant, either because 

 of thinness of the clouds or broken rifts in them. 



Winds: — As with April, this is a month of comparatively few 

 calms, none being reported for 1900, 1902, or 1903. In 1901. for 

 which our records are much fuller, we have recorded 15 periods 

 of calm. 



West winds were rather few; all others were pretty well dis- 

 tributed, those from the south being on the whole, the most abund- 

 ant. For the year for which we have the fullest records we have 

 a goodly record of periods of calm. 



The following is a record of the winds for the time observed : 



Storms: — Rainstorms are frequent, just about as frequent as 

 in April. Two rainstorms were recorded for 1900, 4 in 1901, none 

 in 1902, and 6 in 1903. 



Of other atmospheric phenomena there was one thunderstorm 

 in 1901, and there were 2 cases of noticeably heavy dewfall. It 

 may be observed that "dew", as commonly observed, especially on 

 grass, is as much a biological as an atmospheric phenomenon, 

 being the result of transpiration by herbage, although peculiar 

 atmospheric conditions favor its manifestation. 



The general weather conditions for May are shown in the fol- 

 lowing table : 



Temperatures: — The total number of temperature records for 

 May is 310, as follows: 90 in 1900, 91 in 1901, 53 in 1902, and 76 

 in 1903. 



