282 



Observations upon the effects of Frost, 



exposed to every wind that blows. This plant did not sustain 

 any injury from cold, although the thermometer in its vi- 

 cinity was down to 5° below zero. It may here be worthy 

 of remark that the thermometer was suspended in a bush 

 of Rhododendron campanulatum within the grove above 

 alluded to. Not a leaf, or bud of the Rhododendron, was in- 

 jured, and it flowered beautifully in the early spring. It is 

 obvious that the Araucaria Dombeyi is perfectly hardy, but it 

 is impatient of damp, prefers an open situation, and is liable to 

 have its foliage injured by moisture." At Belsay, unpro- 

 tected, it was not injured in even a single leaf ; at this place 

 it is 7 or 8 feet high and still retains on its stem, at the sur- 

 face of the ground, the leaves which it had when a small 

 plant. A. brasiliensis was destroyed almost everywhere ; at 

 Dropmore, it was protected by a thick covering, and at 

 Woburn, with double boards, and a lining 3 feet thick of 

 fern ; at the former place it afterwards formed buds within 

 four inches of the ground. 



Aristotelia Macqui, a plant which had survived many winters in 

 most parts of England, was generally killed ; but at Carclew, 

 although it had been killed to the ground in the winter of 

 1830-1, it sustained but little damage this season. 



Azara dentata was killed on a south wall in the Society's Garden. 



Berberi s empetrifolia, and dulcis, proved hardy near London, and 

 elsewhere ; even in Nottinghamshire. In some cases they 

 were cut to the ground, but they sprang up again freely. 



Boussingaultia baselloides was observed by Mr. Niven, in the 

 Glasnevin garden, to have remarkably hardy roots. They 

 were exposed near the surface of the ground without any 

 covering, and pushed again vigorously after the frost. 



Brugmansia ; neither species appears to have stood anywhere, ex- 

 cept in Mr. Fox's warm garden at Falmouth. 



Calceolaria ; some hundreds of shrubby varieties, which had 



