Calendar of Nature, 



441 



107 



The double lines, marked 6, show the motion of the mercury in the baro- 

 meter ; tswy the mean temperature of the air, near a south garden-wall ; 

 ty the mean temperature in the open air and in the shade ; rf, the dew-point ; 

 and min. ty the mean of the minimum temperature in the open air at night. 



The coldest day in June was on the 14th : mean temperature of that day 

 47° ; extreme cold throughout the month 38°; wind E. The warmest day 

 in June was the 27th : mean temperature of that day 59-5° ; extreme heat 

 65° ; wind S. E. There were only 5 days of brilliant, and 12 of partial, sun- 

 shine; 13 days were cloudy. The wind blew from the E. and N. E. on 

 5 days ; from the S. and S. E. on 3 days ; from the N. and N.W. on 7 days ; 

 and from the W. and S.W. on 10 days ; and from due E. on 5 days. There 

 were loud westerly winds on the 1st and 2d, and thunder and lightning on 

 the 28th. The coldest day in July was on the 2d : mean temperature of 

 that day 51*5°; minimum temperature for the month 46°. The warmest day 

 in July was on the 28th : mean temperature of that day 71°; extreme heat 

 82° ; wind W. There were 7 days of brilliant, and 6 days of partial, sun- 

 shine ; 18 days were cloudy. The wind blew from easterly points on 10 days, 

 and from westerly points on 21 days. There was a loud gale of westerly 

 wind on the 19th, and long-continued peals of thunder on the afternoon and 

 evening of the 30th. The mean temperature of June was 54*4°, or nearly 

 3° below an ordinary mean ; that of July was 59'5°, or just 1° lower than 

 on an average of the last seven years. 



At the end of May, vegetation was something in arrear. The low tem- 

 VOL. III.—- No. 15. GG 



