Observations made at McGill College Observatory, Montreal, Canada. — Height above sea level 187 ft. 
METHROROLOGICAL ABSTRACT FOR THE YHAR 1891. 
Latitude N. 45° 30'17”. Longitude 4" 54™ 18°55 W. 
C. H. McLEOD, Superintendent. 
SS SS= = —— = = = = es 
. oI © EI} : a e | BE Bs 
THERMOMETER. * BAROMETER. On & Wind Ss Fi 3 ag s |s 2 ms g es 85 
aI . a = n 
$5 |Se/e me] &a| a | SPS| = |Sa | C8g| a2] Be. 
1 Devia | ee | es|s Mean 28 | 3 o lees = 5S $28 | CEs | SES 
: = . é ; = ue! H q & a ra | ASS i/o a 
Mona. |g ftion from] y | = |s28] 8 | 4 | = |ge8] 22 | 28| se | Resuttont | velocity] 7] 38| 2 | Foe| £ |2b2|322| S82 | See es 
S year | & a} ods g S & Sas | se | S2 | 28] direction. |in miles] Be) fs g ae 2 BAS | ea Spa | sag 
= means. | & a ate = = = Pepitsy |] Gre |heeest || rsti= perhour| “2 2 & ct S| Cr) fz peal ee 
January ... .| 15.38 | +4 3-88 | 38.5 | —15.0 | 13.88 81.8 | 10.7} N. 29.0 1.29 6 21.0 23 3.30 4 24 
RARER Ee «| 17.36 | + 1.77 | 45.2 | — 13.0 | 19.11 7.7 | 11.4] 8. ¢ 38.7 1.62 8 18.7 16 | 3.14 5 18 
y 
arch «| 25.94 | +4 1.95 | 49.0}— 21) 14.18 72.1) 18.0] 8. 54.7 2.65 9 16.3 8 3.92 2 15 
April 0 19} + 2.43 | 72.0 21.8| 18.19 67.3 | 31.5] S. 41.5 2.38 12 7.1 6 3.26 2 16 
May 386 | — 2.09 | 80.0 Bol 20.84 61.7 | 38.5758. 45.3, 1.7L 12 o0be 1 1.71 1 12 
June B) + 0.67 | 90.0 40.4) 19.98 63.6 | 51.6] S. 38.4 1.75 8 Be 1.75 op 8 a 
ee =H) yn2! 406) 140 0 | oro 8 Ba) taal sel Pl ce | ami) By Ge 
st — 0.3) | yi 50.6 07S. 58. b a0 : 
Eien + 3.56 | 43.5 42.5) 17.12 74.9 | 53.9] S. 62.7 1.03 14 390 9 1.03 6 14 
October + 0.08} 80.1) 24.5!) 13.45 76.6 | 37-9] S. 6 41.9 2.38 13 1.5 3 2353 2 14 
November + 2 87 | 60.4 | 0.0) 17.21 | 30.0306 74.4 | 28.0]S. 35.9 271 13 3.5 7 3.06 3 17 Novembe: 
December +1075 | 562.5/— 4.0) J4 1 30.0365 78.4 | 23.5] S. 37.7 2.14 lu 12.0 ll 2.34 5 li December. -. 
| | | | || edd a eases ie SOB | ae 
Sums for1891...| . a0 2000 a0 28.16 80.1 74 35 54 2 189 Sums for 1891. . 
Means for 1891 | 13.63 | + 1.88 | 16 87 30.0032 72.7 | 34.8]S oD 2.98 38 16 Means for 1891 . - 
Means for 17) | Means for 17 
ears ending? | 41.75 29.9781 | .... 2600 9900 2495 | 74.3 *15 27] 61.4 |§46.2 |) 28.13) 134 122.0 83 39.97 16 201 ears ending 
ec. 31, 1891.) | a |} ib i | = ee 31, 1891. 
* Barometer readings reduced to 32° Fah., and to sea level. ¢ Inches of mercury. { Saturation, 100. 
lower than the averuge for 17 years, inclusive of 1891. 
of Mount Royal, 57 feet above the ground, and 810 feet above sea level. 
The greatest heat ws 90, 
range was 4°.1lon Aug. 2lst. 
Mar. 3rd, and the greatest velocity in gusts was at the rate of 721n. p. h. 
observed on 12 nights. Fogs on 26 days. Hoar-frost on 17 days. ‘Thunder storms on 18 days. Lunar halos on 8 nights. 
contact ares and parhelia. i 
winter was on December 7th. 
Nors.—The yearly means above, are the averages of the monthly means, except for the velocity of the wind. 
§ For 10 years only. *For5 years only. % ‘+” indicates that the temperature has been higher; “—” that it has been 
The monthly means are derived from readings taken every 4th hour, beginning with 3h. 0m, Hastern Standard time. The anemometerand wind vane are on the summit 
.0 on June 16th; greatest cold 15.0 below zero on January 17th; extreme range of temperature was therefore 195°.0. Greatest range of the thermometer in one day was 49.9 on Jan. Ist; least 
‘The warmest day was July 13th, when the mean temperature was 77 22. The coldest diy was Jan. 16th, when the mewn temperature was 6*.7 below zero. 
on Feb. Lith and Deo, 3lst; the lowest was 28.874 on Jun. 12th, giving arange of 1.851 forthe year. The lowest relative humidity was 250u May 13th and June 7th. e z 
The total mileage of wind was 131,316. The resultant direction of the wind forthe year was 8.5228 W., and the resultant mileage 51,200, Auroras were 
Lunar coronas on 4 nights. 
The sleighing of the winter closed, inthe city, on March 27th, and snow all gone on open ground on April 10th. ‘Lhe first snowfall of the autumn was on October llth. Thefirst sleighiug of the 
Phe highest ni:rometer reading was 30.725 
The greatest mileage of wind recorded in one hour was 59 on 
Solar halos on 8 days and on Dec. 6th, coloured halos of 22° and 46° with 
