ABSTRACT FOR THE MONTH OF APRIL, 1891. 



Meteorological Observations, McGill College Observatory, Montreal, Canada. Height above sea level, 187 feet. C H. McLEOD, Superintendent. 



Sunday a6 



THERMOMETER. 



llean. 



Max. 











36.42 



48-5 



3* -77 



38.8 



32.32 



35-5 



32.12 



38.1 





34-1 





38.3 





48 s 



4=-33 



53-5 



41.07 



44-' 



44-58 







50.0 



34-42 











60.1 



S3-M 



58.5 



«:- 



54 7 



52.17 



63 



including thii 



-Means 

 s for & 



57-49 



4i.T-H 



29.5367 

 29.7130 



30.250 

 29.971 



29 764 

 29.441 

 29.490 



JO-350 

 30.311 

 29.902 



29.560 

 29-575 

 29.752 

 29.541 



t Mean 

 relative 

 humid 



1693 J 



Mean 





s.vv. 





s.w. 





N.B. 





N.E. 





S.W. 





S.W. 



49-5 



S.W. 





S.W. 





N.W 





S-W. 





S.W. 





N- 





N.W 



27.7 



N.W 



ANALYbIS OF WIND RECORD. 



Duration in hrs 

 Meanvolooity.. 



Greatest mileage in one hour was 59 on the 3rd. 

 Greatest velocity in gusts, 72 miles per hour o 

 the 3rd. 



Resultant mileage, 4035. 

 Repliant direction, S. 72° W. 

 Total mileage, 11,633. 



! * Barometer readings reduced to aea-level and 

 1 temperature of 32° Far. 



§ Observed. 

 I t Pressure of vapour in inches of mercury. 

 i X Humidity relative, saturation being 100. 

 IT Ten years only. 



The greatest heat was 72.0 on the 27th; the 

 greatest cold was 21.8 on the 5th, giving a 

 range of temperature of 50- 2 degrees. Warm- 

 est day was the 27th. Coldest day was the 5th. 

 Highest barometer reading was 30.538 on tho 

 10th ; lowest barometer was 29.411 on the 3rd, 



' years means for and 



in- lulling ihis month • 



giving a range of 1.097 inches. Maximum relative 

 humidity was 99 on the 15th. Minimum relative 

 humidity was 29 on the 29th. 



Auroras wei 

 Lunar coroi 

 Fog on 1 da 

 Solar halo c 



1 16 days. 



light. 



