Is/Eeteorological Abstract for the Year 1899. 



ObservationB mado at MoGill College Observatory, Montreal, Canada. — Height above sea level 187 ft. Latitude N. 45° 30' 17". Longitude 4'' 54" 18-67' W. 



C. H. McLEOD, Superintendent. 





Theemomhtee. 



■ Baboueteb. 





£ 3 



1^ 



I'a 





Wind. 





3_S 



1-^ 



1 



"s|. 



«'§§ 



aS.g 

 1^1* 



i 



II 



S 



Hi 



its 







Month. 



S 



IT Dovia- 

 tinn from 

 2.5 years. 



i 

 s 



1 ■ 



sis 



a 



i 



s 



1 



III 



Resultant 

 direction. 



iMean 

 velocity 



per hour. 



Mouth. 



.Tniumry 



Ftiliruary 



H.24 

 in. 13 

 22.16 

 42 8,5 

 6C.58 

 B5.il7 

 C8,.ll 

 OS. 8.1 

 51.80 

 4!). 17 

 .1-1.45 

 24.6,5 



+ 2.10 

 + 0.47 



- 2.34 

 + 2.60 

 + 1.79 

 + 1.08 



- 0.67 

 + 2.13 

 -3.69 

 + 8.63 

 + 1.88 

 + 5.49 



49.0 

 41,0 

 42.6 

 82.0 

 78.4 

 87.0 

 84-4 

 68.8 

 77.0 

 78.8 

 48.7 

 66.4 



-19.4 

 -13.1 

 - 6.0 

 21.6 

 36.0 

 01. 

 61 1 

 51.2 

 36.1 



16 6 

 -12.3 



18.01 

 12.18 

 13.34 

 16.94 

 18.76 

 17.43 

 16.65 

 10.04 

 14.80 

 18.28 

 9.27 

 13.02 



30.0671 

 29.9436 

 29.9856 

 30.0372 

 29.9706 

 29.9176 

 29.8762 

 29.9518 

 20.9646 

 ,30.1631 

 30.0146 

 29.9903 



30.777 

 30.573 

 30..583 

 30.4U9 

 30.204 

 30.227 

 30.103 

 30.270 

 30.425 

 30.612 

 30.603 

 30.034 



29.210 

 29.274 

 28.998 

 29.395 

 29.611 

 29.491 

 29.690 

 29.623 

 29.463 

 29.721 

 29.649 

 29.088 



.418 

 .318 

 385 

 .176 

 .162 

 .167 

 .135 

 .114 

 .230 

 .178 

 .235 

 .308 



.0836 

 .0864 

 -1035 

 :2042 

 .3041 

 .4426 

 .5149 

 .5018 

 .3382 

 .2773 

 • 1655 

 .1302 



83.2 

 79.6 

 81.8 

 70.7 

 68.1 

 68.7 

 74.2 

 70.7 

 76.9 

 75.5 

 80.8 

 88.6 



10.0 

 10.7 



33!5 

 45.3 

 64.6 

 59.2 

 58.2 

 47.4 

 41.4 

 29.0 

 21.7 



S. 46° W. 

 ,S. 46i° W. 

 N. 75f W. 

 S. 4.51° W. 

 N. 64}° W. 

 S. 86i» \V. 

 S. iSi'W. 



s. aar w. 



B.W W. 

 S. 61i° W. 

 S. 794° W. 

 S. 40° W. 



17.97 

 18.66 

 16.66 

 13.68 

 13.47 

 12.79 

 13.92 

 11.43 

 14.67 

 10.22 

 13.52 

 13.73 



54 

 53 

 60 

 40 

 47 

 50 

 66 

 44 

 57 

 63 

 66 

 72 



39.6 



48.4 

 39.2 

 63.0 

 61.0 

 63.7 

 63.5 

 64.3 

 43.2 

 39.7 

 28.7 

 17.4 



2,03 

 0.54 

 2.23 

 1.37 

 1.69 

 2.46 

 7.72 

 2.62 

 6.08 

 3.39 

 1.60 

 2.36 



5 



6 

 8 

 13 

 14 

 16 

 21 

 11 

 17 

 12 

 12 

 9 



25.1 

 9.1 



43.7 

 1.9 



'li.'o 



2.4 

 24.9 



19 

 16 

 20 

 3 



'2 

 6 

 15 



4.62 

 1.63 

 8.63 

 1-63 

 1.69 

 2-46 

 7-72 

 2.52 

 5.08 

 3.39 

 1.84 

 4.84 



3 



4 

 7 

 2 



i 

 2 

 4 



21 

 17 

 21 

 14 

 14 

 16 

 21 

 11 

 17 

 13 

 16 

 20 



201 



fanuary 



February 



March 



April 





Meiv 



Juno 



j^ 





July 



August 



September 



October 



November 



December.. . . - - . 



AUKllHl, 



Soiili.mlmr 



Ootijliiir 



Novoiiiljur' 



DciKiiiibor 



Slims i'or )m , . . 

 Mourn for 18KI , . 



4318 



+ 'i'20 







is.oi 



29 '9902 







'.'235 



-2625 



76.'6 



35.'7 



S. 54i»'w. 



ii.'OB 



■55 ■ 



47.'6 



32.88 



143 



107.1 



81 



45.80 

 3.82 



23 



Sums for 1899 - - . 

 Means for 1899 . . 



Moiira for 26) 

 fours Oliding^ 

 1)00. .31, 1891). S 



41.08 











29.9812 









.2541 



75.2 







a 14.97 



60 



§45-91 



28.41 



135 



118.7 



79 



40.17 



16 



202 



Means for 25 ) 

 years ending > 

 Deo. 31, 1899. i 



./tteK™™"'''?^'™"''"""'' '."'?"?"''• ''J'llte^'U?™'- t Inches of mercury, t Saturation 100. § For 18 years only, a For 13 years only. If "+" indicates that the temperature has been AiWer: "—"that it has been 

 l;..?ff.'''''Y",™8°.f"C.2?5"!i"'.8 inclusive of 1899. _ The monthly moans are derived from readincs taken every 4th hour, bemnninirwith 3 h. m. Eastern Standard time. The anemometer .i-nd wind vino n.re on the 



ii;o, The greatest heat was 88.8° above aero on 

 n- 1 00 January 27 ; least range was 2.'»oiiNov. 

 Tk'„°; 1 /"."'"West relative humidity was 3" 

 Ihotolal miloaBo of wind was 123,444. The 

 lirnir haloB on 8 nights ; lunar ooronaa on 45 nights ; 

 NoTE.-Tho yearly moans of tho above 



Ane. ..1 : the greatest cold was 19.4 below zero on January 10. The extreme r.ange of temperature was, therefore 108.°2. Greatest range of thermometer in one day was 



1 . Ti ^i^arniest day was Jnne 13, when the mean temperature was 76.°43 above zero. The coldest day was January 10, when the mean temperature was 13.°43 below 



Y line A), llie greatest mileage of wind recorded in one hour was 64 miles on January 27, and the greatest velocity in gusts was at the r.ate of 06 miles per hour on March 6. 



Itantdirootioiiot the wind lor the year wasS. 5(i°W., and tho resultant mileage 53.900. Auroras were observed on 9 nights ; fog on 42 days ; thunder storms on 12 days; 



ns on L days lurst sleighing of winter in city on November 12. The first appreciable snowfall of the autumn was on November 11. 



tho averages of the monthly means, except for the velocity of the wind. 



