'"' ABSTRACT FOR THE MONTH OF DECEMBER, 1899. 



Meteorological Observations, McGiU CoUege Observatory, Montreal, Canada. Height above sea level, 187 feet G H. McLEOD, Superintendenu 



== 



THERMOMETER. 



♦ BAROMETER. 





tMean 

 pressure 

 of vapor. 



tMean 

 relative 

 humid- 

 ity. 



Dew 

 Point. 



WIND. 



IN Tfnths. 



Si 





|| 





DAY. 



OAV 



Mean, 



Max. 



Min. 



Range. 



Mean. 



§Max. 



§Min. 



Range. 



General 

 direction. 



Mean 

 velocity 

 m miles 

 per hour 



s 



7 



'b 



5 



9 

 7 



's 





 5 



8 



\ 



41.27 



=4-67 



18.47 

 "■77 



37.17 

 47 03 



15.63 



8.83 



35-63 

 39.60 

 30.8s 



30.02 



24.'63 



16.13 

 16.67 



\Im 



-4.88 



48.0 

 48.0 



37.7 

 33.8 



37.1 

 31.0 

 19,0 



33.6 



56.'4 



14.7 



31.4 

 37.1 



ii 



37.3 

 37.0 



III 



31.6 



37 

 o.S 



34 



15 



iB 

 9 

 6 



31 

 7 



8 



33 



9 



—9 



4 

 7 



6 



3 



5 



6 

 I 



I 



5 



14.9 

 13.9 



14.6 



17.7 

 9.3 



15.1 

 9.8 



35.8 



13.9 

 •4^8 



19.3 

 9.0 

 11.9 



?^ 

 16.1 



13.8 



13.1 



29.6060 

 29.4758 



29,5600 

 29.8243 

 30.1327 

 30.3105 

 29.9917 

 30.4513 



30,0180 

 39.6053 

 39.8322 

 30.3318 

 30.0637 

 30-5732 



30.3512 

 39,9762 



30.2553 

 30.3292 

 30.0500 



29.378B 

 29.7512 

 29.9803 

 30.0420 

 29.8943 

 29.7310 



29.83s 

 29.494 



29.671 

 29.931 

 30.453 

 30-534 

 30,218 

 30,508 



30,159 

 39,816 

 30.037 



30.381 

 30.634 



30.428 

 30.. 84 

 30,311 

 30,278 

 30,360 

 30. 300 



29,600 

 29.882 

 30.033 

 30.085 

 29,091 

 39.833 



29.376 

 29.376 



^9.458 



29,910 

 39.926 

 29,810 

 30,218 



29.816 



39.724 



29.753 

 30.38. 



so'.isi 

 39,854 

 30,090 

 30.191 

 30.278 



29.088 

 29.600 

 29.882 

 29.991 

 29.833 

 29.687 



.313 

 •309 

 .543 



:4o8 



-343 

 -3.3 

 .628 

 .253 



■330 



ioB, 

 .083 

 .480 



..46 



'208a 



.0845 

 -0937 



ill 



^2862 

 .1975 

 ,0953 

 ,0903 

 .0580 



,1772 

 .1982 

 ,1372 



::i 



■.0798 



'.0862 

 .0800 



90.8 



87:2 

 88.2 



88.8 

 88.8 



88 ',5 



Bg's 



9'. 3 

 ll-l 



76.'5 

 87.3 

 83.3 

 80.2 

 96.0 

 92.3 



38.5 



i6!8 

 16.5 



43.8 

 i6'.8 



6.2 



f\ 

 28:5 

 25.2 

 27.2 



is.'? 

 13-3 



"Ib 

 -6.7 



S.E. 

 S.W. 



S.W. 

 N.W. 

 S W. 

 N, 

 S.E. 

 S.W, 

 N.W. 



S.E. 



S. 



S. 

 S.W. 

 N.W, 

 W. 

 W. 



S,' 



s, 



s,w. 

 s,w. 



s. 



N. 

 S.E. 



E, 

 S.W. 



S.w. 



S. 



S.W. 



S.W. 



S.W. 

 S.W. 



20! 62 



.3.83 

 21.25 

 .3.46 



loiS 

 .7.67 

 5. 47 



,0,87 

 15.87 

 22.08 

 i6,i6 



7-42 

 11,37 



ib!62 

 7-67 

 0,42 



19,50 

 .7.25 



s'.si 



5-96 



6,13 



.2,46 



8.5 

 6.0 



8.3 

 5-3 

 7-3 

 9.2 



6.3 



'9'S 



I'-l 

 9.2 

 3.3 



3.7 



5.1 



25 

 16 



86 



35 



55 

 28 

 5 

 60 



111 



o!^ 

 0.83 



o.'e^ 



6,2 



3 

 3.3 



7.a 



o'o6 

 0.62 



0-33 



o!4S 



0,83 



o.'6S 



0,03 

 0,04 



^ 



SUNDAT..... ..• 3 



8 



9 



5 



S 



9 



SlJNDAV 10 



13 



16 



. .SUNUAV 



18 



19 



30 



2B 



29 

 30 











M 



34.65 



30.65 



17.63 



13.0! 



29,9903 

 30,029; 



30.139 



ao 821 



,308 



,1302 



85.57 



21,7 1 S.40«\V. 



.3.73 



7.18 



9.4 



— 



.7.4 



3.35 



24,9 



4.84 



Sums 











isVcais means 1 

 for and including 

 ihlsmonlli ' 



,9.16 



36.27 



,2.00 



14.27 





.297 



..0.3 



83.19 



,.., 1 .... 



» 16.46 



6.89 



II28.47 



1.36 



23-48 



3.64 



(25 Years means for 

 <and including this 

 /month. 



ANAL 



YSIS OF WIND RECOED. 



1 



• Barometer readings reduced to sea-level and 

 temperature 32^ Fahrenheit. 



§ Observed. 



t Pressure of vapour in inches of mercury. 



1 Humidity relative, saturation being 100. 



V 18 years only, s 13 years only. 



The greatest heat was 56° .4 on the 12th; the 

 greatest cold was -12°.3 on the 31st, giving a range 

 of temperature of 68.7 degrees. 



Warmest day was the 12th. Coldest day was 

 the 30th. U ighest barometer reading wa^ 30.634 on 

 the 16th. Lowest barometer was 29.088 on the 25th, 

 giving a range of 1.546 inches. Maximum re- 



lative humidity was 99 on 

 15th,21st, 22nd, 23rd. Minim 

 was 65 on the 19th, 

 Rain fell on 9 days. 

 Snow fell on 15 days. 

 Rain or snow fell on 20(1 

 Hoar frost on 2 days. 

 Lunar coronas on tho 



the 4th, 11th, 12th, 

 um relative humidity 



ays. 



7th, 12th, 13th, 15th 



Direction N. 



N.E. 



E. 



S.E. 



S, 



s.w. \v. 



N,W. 



Calm. 



Mile. 



890 



238 



■55 



883 



2053 



4361 1141 



493 





Uuralion InllrB,, 



93 



15 



38 



66 



143 



231 67 



39 



72 



Mean velocity.... 0.57 



15.87 



5-54 



.3.38 



14.36 



18.88 17.03 



.,.00 





Qreatoat uiiloaKo iii ono hour 

 noih. 



Qreatost volooity in gusts, 44 

 0" tho 12m. 



vas 40. on the 

 miles per liour 



Reauilant miloiice. 5,1160. 

 Riisultnnt direction, S. 40" W. 

 Total mileage, 10,214 



Fog on 2 days. 





