182 



Miscellanies. 



SOLAR RADIATION. 



Remarlcs, — These observations were made during the warmest and brightest 

 days of July, on the Montreal mountain, place of observation 307 feet above St. 

 Lawrence. The_/i?-si column gives the day and hour ; iht second, the indication 

 of Sir John Herschel's Actinometer, (by Robinson, London,) mean of three ob- 

 servations : — the third, the temperature of air in the shade, Thermometer 5 feet 

 above the earth ; the fuurtli, the indication of the Thermometer placed in the sun 

 on garden mould, (not blackened,) after an exposure often minutes. N. B. This 

 Actinometer was, in Sept. 1837, compared on the same spot, with one in the pos- 

 session of Dr. Daubeny of Oxford, England, and gave similar indications. 



TERRESTRIAL RADIATION. 



Remarks. — The first column indicates the 24 hours during which the observa- 

 tion was made, reckoning from 9 A. M. of one day to 9 A. M. of the next ; the 

 second gives the max. of the Thermometer in the shade, for the same period ; the 

 third, the min. ; the fourth, the indications of a register spirit Thermometer, 

 placed on a grassplot and exposed freely to the Heavens during the night. All 

 these instruments are made by first artists (British) and carefully compared with 

 standards. 



Storms, <^c., during the year. 



January 8 — Wind shifted suddenly from N. W. to S. at 2 P. M. ; at 4, blew a gale 

 — lasted most of the night — dust flying — no snow. 

 " 27 to 28 — Heavy snow storm from N. with heavy fall of snow — lasted 

 48 hours. 



April 8 — Storm with rain — wind, moving at N. — at 2 P. M. shifted suddenly to 

 to S. through E. — blew a gale with heavy rain. 



July 29—3.30 P. M.— Thunder storm from the N. W. with heavy rain. The 

 storm passed up the St. Lawrence, along the Montreal or north shore 

 of the river, returned in about 30 minutes down the south shore 

 along Laprairie, as far as Boucherville, and again returned up the 

 river with increased violence — thunder, lightning, and the heaviest 



