METEOROLOGICAL OBSERVATIONS. 



Monthly Meteorological Summary, Lansing, Michigan, September, 1915. 



231 



B.\ROMETER^Mean, 30.04 inches; highest, 30.38 inches, on 2nd; lowest, 29.57 inches, on 20th. 



Temperature— Highest, 89°, on 14th; lowest, 33'?, on 29th; greatest daily range, 37°, on 2nd; least daily range, 3°, on 6th; 

 normal for month, 61.6°; excess or deficiency this month, +1.6°; accumulated excess or deficiency since January 1st, —301°; 

 average daily, same period, —1.1°; highest in 30 years, 9J)°; lowest, 21°. 



Precipitation (in inches) — Total amount, 6.55; normal, 2.62; excess or deficiency this month, +3.93; since January 1st, +4.11; 

 greate.st amount in any 24 hour period, 1.96, on 5tli and 6th; total snowfall, 0.0 inches. 



WiND^Prevailing direction, southwest; total movement, 3,553 miles; average hourly velocity, 4.9 miles; maximum velocity, 

 19; from the northwest, on 26th. 



Dates of— .Auroras, 0; dense fog, 0; hail, 0; sleet, 0; thunderstorms, 8, 10, 12, 14, 16, 20, 23; halos: solar, 25, 30; lunar, 24; 

 Frost: killing, 0; heavy, 29; light, 22, 28, 30. 



DEWEY A. SEELEY, 



Local Forecaster. 



