﻿ABSTRACT FOR THE MONTH OF APRIL, 1897. 



Meteorological Observations, McGill College Observatory, Montreal, Canada. Height above sea level, 187 feet. C H. MoLEOD, Hvmerinu^uieni 



THERMOMETBR. 



Mean. Max. Mm. Range. 



33-97 

 »3.32 

 39-47 

 47-57 



46.62 

 39-35 

 47-57 

 50.78 

 50-57 



BAROMETER. 



29.666a 

 29.689a 

 30.0412 

 300413 

 29-8573 

 29.8775 



29.89(0 

 29 8703 



29.«038 

 29.7313 



29.8915 

 30.4743 

 30.4293 



29.5787 

 19.7462 

 29.9588 



30.0768 



30-543 

 30-350 

 30-55' 



^9-795 

 29.868 



30.499 

 30.483 

 29975 

 29.976 



30-372 

 30.558 

 30.478 

 30.384 



29-593 

 29-599 

 29.956 



30.270 

 29.949 

 29.844 



29-74» 



29.782 



aS).630 



29 574 

 30.428 

 30.397 



29.992 

 29.938 



tMean 

 pressure 

 of vapor. 



ANALYSIS OF WIND RECORD. 



Direction 



N. 

 1324 



N-E. 

 13.9 



E. 



51 



S.E. 



40s 



6. 



s.w. 



w. 



N.W. 



Calm. 



'545 



5559 



376 



1288 









Duration in hrs.. 



92 



88 



9 



47 



81 



289 



35 



71 



8 



Mean velocity-.- - 



■4-39 



14.99 



5.67 



8.6a 



19-07 



"9.24 



10.74 



> 



Greatest mileage in one hour was 53 on the 19th. 

 Greatest velocity in gusts, 60 miles per hour on 

 the 19lh. 



Resultant mileage, 472-}. 

 Resultant direction. S. 56jo W. 

 Total mileage, 11867. 



M: 



relative 

 humid 



S.W. 

 N.E. 

 N.E. 



S.W. 



N. 

 S.W. 



S.W. 

 S.W. 

 N.W. 



N. 



perboui 



7.88 

 8.54 



8.67 

 15.42 

 17-79 



8.67 

 8.46 

 18.38 

 24.46 

 .,.96 

 18 04 

 J3-33 



3^:18 



aI-13 



24.58 



19.50 

 19.83 



'3-75 



13-67 

 26.71 

 12.58 



45-37 3-02 

 fS.-x '.67 



§ Observed. 



f Pressure of vapour in inches of meroary. 



I Humidity relative, saturation being 100- 



T 16 years only. 



» 11 years only. 



The greatest beat was 74 °3 on the 23rd; the 

 greatest cold was 10.° 9 on the 20th, giving a range 

 of temperature of 63.4° degrees. 



Warmest day was the 2:ird. Coldest day was 

 the 20th. Highest barometer reading was 30..558 

 on the 2Uth. Lowest barometer was 29,4H on the 



23 Years means for 

 and including this 

 month. 



26th, gi/ing a range of 1,114 inches. Maximum 

 relative humidity was 98.0 on the 5th. 

 Minimum relative humidity was 36 on the 2nd. 

 Rain f^il on 18 days. 

 Snow fell on 2 days. 

 Rain or snow fell on 19 days- 

 Auroras were observed on 1 night, on the 



Fog on 3 days-on 6th, 9th and 25th. 

 Thunder storms on 23rd and 25th. 



