COUNCIL FOR 1851. IS 



The temperature of the year 1851 was again nearly an exact 

 mean 47*3. The mean for the last twenty years was 47*5. 

 Since the year 1846, the mean annual temperature of York has 

 exhibited a remarkable uniformity. 



Temperature of 1846 5000 



1847 47-80 



1848 47-50 



1849 4705 



1860 47-00 



1851 47-30 



The month of January was 4° above a mean, and the month 

 of November 5° below. The year like its predecessor was 

 distinguished by an amount of rain considerably below a mean. 

 In 1850, the total was 17-89 inches ; in 1851, 20-46 ; the 

 mean for 20 years being 24-27 inches. The month of Novem- 

 ber seems to be losing its pluviose character. In 1844 on an 

 average of 13 years November was second in amount of rain, 

 July being first. The diminished quantities of the last few 

 years have placed it fifth in amount of rain fallen, July still 

 retaining the first place. November, 1851, appears to have 

 been the coldest and the dryest November of the last 20 years. 



The pressure of the mercurial column is again about a mean, 

 being 29-89 5 inches, reduced for capillarity and temperature. 

 The range between the two extremes of the year was 1-786 

 inches. Thunder and lightning were of rare occurrence during 

 the year. A heavy storm burst over the city on the 21st June, 

 accompanied with -77 inch of rain, and another about the 

 usual time in the first half of the month of August. The term, 

 usual time, will be justified by the following statement of 

 thunder storms at York in that month. 



1851, .. August 13, Winds Rain -03 



1850, .. „ 8&9 „ S.W. „ 1-08 



1849, .. „ 8&9 „ S.E. „ 106 



1848, .. „ 9&10 ,, W. „ -07 

 1847, not observed, probably noctc ? 



1846, .. Augustl,2,7,& 13 "Winds, Rain -63 



1846, .. „ 9 „ E. „ -95 



1844, .. „ 13 „ S.W. „ -11 



1843, .. „ 15&16 „ W. „ 1-96 



1842, .. „ 10 „ S. „ 1-44 



