478 Transactio7is (ftJie hondon Horticultural Society. 



i 



Temperature. 



Wind. 1 Kain. 



Radiat- 

















ing Observations. 



Max. 



;Min. 



Direction. 



Force. 



In. Pts. 



Therm. 



1 



48 



32 



s 



Little 



•01 



27 



Fine ; slight rain. 



2 



48 



41 



s 



Brisk 



•02 



37 



Cloudy and fine. 



3 



48 



27 



s 



Little 



•04 



22 



. Very fine. 

 Dense fog. 



4 



48 



28 



sw 



Ditto 





25 



5 



34 



30 



NW 



Ditto 





29 



6 



7 



36 

 35 



33 



27 



NE 

 NE 



Ditto 

 Ditto 





32 

 23 



I Bleak and cold. 



8 



30 



22 



E 



Ditto 





20 



\ Frosty, slight snow. 



9 



25 



22 



NE 



Ditto 





20 



10 



26 



13 



NE 



Ditto 





9 



1 



11 



27 



11 



N 



Ditto 





5 



■ Frosty. 



12 



24 



9 



E 



Ditto 









13 



25 



20 



NE 



Ditto 





16 





14 



26 



4 



N 



Ditto 





—3 



Ditto with slight snow. 



15 



26 



\b 



NW 



Ditto 





9 



Frosty. 



16 



29 



21 



NE 



Ditto 





19 



Ditto and foggy. 



17 



30 



20 



N 



Ditto 





18 



Ditto. 



18 



23 



19 



NE 



Brisk 





10 



Snowing. 



19 



22 



— 4i 



N 



Little 





— 12 



Severe frost and clear. 



20 



11 



7 



N 



Ditto 





3 



\ Most intense frost ; therm. 

 '|_ at 8 A. M. at zero. 

















21 



38 



28 



SE 



Ditto 





22 



Overcast ; thawing. 



22 



46 



29 



SE 



Ditto 



25 



Fine. 



23 



37 



24 



E 



Ditto 



18 



Hazy and cold. 



" At Sevenoaks*, the following hourly and other observations, made by 

 Mr. Rogers, are too curious to be omitted. 



Friday, January 19th-, 5 p.m. - - 12' 



5i . . - 7 



6i . . ._i 



71 - - 



11 

 ■Saturday, January 20th, 12| a. m. 



12 

 3 



-2 

 -3 



' clear, 

 do. 



becoming overcast, 

 overcast, 

 clear, 

 do. 

 do. 



The foregoing observations were made with two self-registering thermometers, 

 one vertical and one horizontal, laid upon a board, on a bank of snow facing 

 N.W. One of the instruments was made by Knight of Foster Lane, the other 

 by a different person, and both had been compared and tested accurately with 

 a thermometer made by Newman. The register of the horizontal instrument 

 became deranged at the 6| p. m. observation, the spirit receding from the 

 register, which was lodged against the bend of the tube. The remaining 

 observations were with the vertical thermometer (Six's), checked by the 

 mercurial side of the horizontal one; but in the observation at 12J a. m. the 

 mercury had passed the register of the vertical thermometer, so that an allow- 



* At this place a singular pheenomenon was observed by Mr. Rogers. 

 During the extreme cold the branches of a lime-tree, which overhangs a part 

 of his garden, dx'ooped so as completely to lie on the ground, and those above 

 fell proportionately ; there was neither ice nor rime on them to increase their 

 weight, so that this phaenomenon must have been some direct eflect of cold. 

 The branches recovered themselves as the day advanced and grew warmer, 

 and eventually they so completely regained their original position, that Mr. 

 Rogers at first thought his gardener had cut away all that drooped and im- 

 peded the path the morning before. 



