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LV. Report upon the effect produced on certain Plants in 

 the Garden of the Horticultural Society, by the Frost 

 which occurred during the Night of April 29th, 1826. By 

 Mr. John Lindley, F. L.S. $c. fyc. Assistant Secretary 

 for the Garden. 



Read June 20, 1826. 



On the night of the 29th of April, 1826, after a long series 

 of fine weather, which from the commencement of the month 

 had been only interrupted by a refreshing fall of rain on the 

 11th, to the depth of half an inch, and during which the days 

 had been warm, with serene weather and a temperature vary- 

 ing from 52° to 68° at noon, there occurred one of those 

 severe and unforeseen frosts which are too often fatal to early 

 vegetation in this climate. Plums, Cherries, and Straw- 

 berries were in full flower, Pears were setting their fruit, and 

 a few Apples had begun to expand their blossoms ; the young 

 shoots of the Vine, the Walnut, and the Ash,, had pushed to 

 the length of several inches ; and the produce of the Kitchen 

 Garden was, from the previous rapidity of vegetation, in a 

 state of high susceptibility. 



The day of the 29th of April was cold and cloudy, with a 

 brisk north wind ; the thermometer in the shade did not rise 

 higher than 51° ; in the evening the sky became clear towards 

 the north and west, and the wind was sufficiently high to 

 prevent the formation of dew ; at nine in the evening the 

 dew point was 30°, and the temperature 32°; but towards 

 morning the wind fell, the sky became very clear, and at 



