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STATE BOARD OF AGRICULTURE. 



Monthly Meteorological Summary. Lansing. Mich., Dcccmhrr. 1918. 



Barometer — Mean, 30.05 inches; highest, 30.62 inches, on 18th; lowest, 29.48 inches, on 3rd. 



Temperatitee — Highest, 54®, on 22nd; lowest, 2°, on 28th; greatest daily range, 23°, on 28th; least daily range, 2°, on 24th; 

 normal for month, 26.8°; excess or deficiency this month, -|-6.1°; accumulated exfcess or deficiency since January, 1st, —39 ; 

 average daily, same period, —0.1°; highest in 33 years, 62°, lowest, —24°. 



Precipitation (in inches) — Total amount, 3. 61; normal, 2.08; excess or deficiency this month, + 1.53; since January 1st, -{-0.87; 

 greatest amount in any 24 hour period, 0.97, on 21st and 22nd; total snowfall, 10.0 inches. 



Wind — Prevailing direction, southwest; total movement, 4,875 miles; average hourly velocity, 6.6 miles; maximim velocity 

 25, from the northwest on the 5th. 



Dates OP— Auroras, 7, 8; fog, dense, 31; hail, 0; sleet, 12, 13; thunderstorms, 0; Halos: solar, 7, 12, 17; lunar, 0; frost: killing, 0; 

 heavy, 0; light, 0. 



DEWEY A. SEELEY, 



Meteorologist. 



