392 



METEOROLOGICAL OBSERVATIONS. 



London in 1842, of the greatest exactness, and compared by myself 

 with the standard thermometer of the Royal Astronomical Society of 

 London. A short table for the isothermal lines from these data may 

 thus be stated : 



From which it appears by these tables that the greatest change of 

 temperature on the continent of Europe takes place in Moscow, and 

 the greatest in Canada, in St. Mary's, the relative difference being 

 noted above. 



The table of rain or melted snow, is also of considerable interest, 

 shewing the amount which our streams and rivers have to carry off. 



The annual sums point out that the Peninsula of Canada being sur- 

 rounded on all sides by lakes or large deposits of water, the air be- 

 comes greatly saturated with moisture, which falls upon, and fertilises 

 our fields and lands, and that Toronto is the greatest recipient of such, 

 fall being 37.16 inches ; St. Mary's, the second, 35.42 ; "Woodstock, 

 34.45, and London, in England, 24.26 inches. The amount at St. 

 Petersburgh is very small, and as we know it to be in high northern 

 latitudes, viz : 16.49 inches. 



This table for St. Mary's being for only one year will have to be 

 corrected by future observations, which I am making daily, and shall 

 transmit to the Institute as soon as completed, if deemed of sufficient 

 value. 



The table of atmospheric phenomena for the year 1858 in St. Mary's, 

 shews in a forcible manner the genial nature of the climate in this 

 part of the province. We have by these tables following, 42 per cent, 

 fine, clear days, and very nearly 24 per cent, changeable and cloudy 

 days, as also 19 per cent, quite dull, cloudy days, and only 15 per 

 <;ent. absolutely snowy or rainy days, this must be admitted to be a 

 very favourable view meteorologically of our Canadian climate. 



The direction of our air currents is also of great importance for this 

 «levated part of the Province, and the observations shew, that the 

 great majority of them are from the westward, being 38 per cent, on 



