ABSTRACT FOR THE MONTH OF SEPTEMBER, 1900. 



Meteorological Observations, McGill College Observatory, Montreal, Canada. Height above sea level, 1S7 feet. C. H. McLEOD, Superintendent. 



THERMOMETER. 



58. oB 

 6>.ii 

 57.7" 

 67.73 

 63.91 

 53.43 

 54.36 



54. '5 



67.17 

 66.50 





1.8 



6.7 

 B.o 



63 



B.I 



[i 

 47 



59 



6.3 

 B.I 





5.; 



n 



9.3 







5» 





u 



.8 



11) 





46 



.6 



55 



1.S 



«3 





54 







'.7 





■•) 



54 





4' 



♦ BAROMETER. 



76.19 



S.W. 



s w. 



S.W. 

 N.W. 

 S.W. 



1(53.57 



3.27 



nd includii 

 nonth. 



AMALYSIS OF WIND RECORD. 



Mci 



■cloclty... 



73 



13.8 



UrojiteBt iiiiloiLKO in ono hour whs 43 from the 

 mo«l on tho 12th. 



tiiciitost velocity in eustp -najB 48 miles per 

 liflur Trom (lio vimt, nt .'t.SO p.m. on tho Srd, and 



■3.' 



40 ii.m. on the 12th. 

 Koeultiiiit iniloaeo, ^60. 

 Rosultant direction , W. 35 .4° S. 

 Total inilenBO,9.:<35. 



Barooietor readings reduced to sea-level and 

 temperature 32° Fahrenheit. 



Mean of bi-hourly readings taken from 

 self-recording instruments. 



;Uumidity relative, saturation being 100. 

 Moan of observations at 8, 15, and 20 hours. 



^19 years only, g U years only. 



The greatest beat ivius 89.0 on the 3rd; the 

 greatest cold was 4ti.O on the 2yth, giving a range 

 of temperature of 43.0 degrees. 



Warmest day was the 3rd. Coldest day waa 

 the lilth. Highest barometer reading was 30.37 on 

 the 1st and l»th. Lowest barometer was 29.05 on 

 the 12th, giving range of 1.32 inches. 



Minimum relative humidity observed ' 

 1 the 1st. 



Rain fell on 11 days. 



Lunar halos on the lOtb and 11th. 



Fog on 3 days. 



Thunder on the 3rd, 6tb and 16th. 



