2<)1 



Observations upon the effects of Frost, 



had not been lighted, while it received no harm upon the open wall. 

 At the village of Great Malvern, a very cold and exposed place, 

 situated on the eastern slope of a ridge of high hills, Mr. Dillwyn 

 found that none of the evergreens were at all injured, though they 

 suffered severely on the plain, 2 or 3 hundred feet below the village, 

 and in the neighbourhood of Worcester, which is only 8 miles dis- 

 tant. This corresponds with a remark made by W hite in his Sel- 

 borne, letter 63, that in the severe frost of 1784, his evergreens suf- 

 fered much in his warm sequestered garden, while those in such an 

 exalted and near situation as Newton were uninjured. Mr. 

 Williams observed, that at Cheltenham there was a very 

 marked difference between the injury sustained by plants in the 

 lower part of the town, and in the higher ground above the " Mont- 

 pellier Spa ;" in the former, the Laurustinus were turned brown and 

 withered; in the latter, they in a great measure escaped. In 

 the low ground at Brenchley, the Arbutus was killed, but on 

 higher levels it escaped ; and in the same place, under the same cir- 

 cumstances, the double white Camellia escaped, but the single red 

 was killed ; in short, the general rule was found by Mr. Hooker 

 to be, that those plants the most sheltered from the north, and open 

 to the south and south-east, were the most injured, but on the high 

 grounds, open to the north and screened from the south, plants 

 suffered much less ; there, many of the most hardy kinds of stan- 

 dard Chinese roses escaped, and the hollies, laurels, and Portugal 

 laurels were not in the least injured. At Brenchley there are 

 some extensive Portugal laurel hedges, which run from the highest 

 to the lowest parts of the grounds ; these presented a striking in- 

 stance of the effects of the frost ; in the lowest part they were 

 quite killed to the ground, were gradually less injured as the 

 ground rises, and on the upper part of the ground the hedges were 

 in a fine healthy state. Mr. Philip Davies Cooke tells me that 

 he saw in Wales a shrubbery at least six hundred feet above the 

 sea, as little, if not less injured than those in lower regions, and a 



