Proposal to name Collections of Trees and Shrubs. 517 



Art. IV. On the injurious Effects of Ryan's Anti-Dry-Rot Solution, 

 as regards the Destruction of vegetable Life in the Gardens at 

 Thoresby, Nottinghamshire. Communicated by the Right Hon. 

 the Earl of Manvers. 



Some of the rafters in one of the pine and grape houses in Thoresby Park 

 having become quite decayed by dry rot, Earl Manvers was recommended 

 to use timber for the new rafters which had been steeped in one of Kyan's 

 patent tanks. Accordingly, ten new rafters for the roof lights to work upon 

 were put up in February, 1837; such rafters being first steeped in the solution, 

 at the strength of one pound of corrosive sublimate to ten gallons of 

 water. These rafters were in use one year before being painted, and in 

 that time totally killed three fine vines trained to the first three rafters, and 

 seriously injured those trained to the remaining seven rafters ; so much so, 

 indeed, as to quite kill the fruit upon them ; and, in fact, such was the injuri- 

 ous effect of the poisonous vapour drawn from the wood, that the fruit in 

 the remainder of the house was of a very inferior description. The pine 

 plants standing immediately under these rafters were seriously injured, and 

 a considerable number of them were quite destroyed ; the remainder, on 

 being placed in the fruiting pit, in a very short time put up a small weak 

 premature fruit. 



The cause of this great damage to both the vines and pine plants was, the 

 damp vapour which arose from the heat of the house ; and also from rain 

 soakage occasionally falling upon them. 



In the spring of 1838, these rafters were carefully painted four times over ; 

 but, although the injurious effects were thereby in some degree diminished, 

 yet the plants looked unhealthy, and did not fruit properly. 



At the present time, the young vines are looking yellow, and have not a 

 single bunch of grapes upon them ; and the pines under these ten rafters 

 are weak and unhealthy, when compared with those at the other end of the 

 house. 



In 1837, twelve young vines in pots were watered with water taken from 

 a tank in part supplied from the roof of this hot-house, and these plants 

 were all killed in a very short time. 



A trelliswork flower stand, made of deal timber that had been steeped in 

 the solution, was placed in a small green-house in the gardens, and if this 

 had not been taken out, every plant in the house would have been killed by 

 the noxious vapour arising from the wood. The plants soon came round 

 again after the removal of the trellis. 



Thoresby Park, July, 1839. 



Art. V. A Proposal to name Collections of Trees and Shrubs in 

 Public Gardens and Nurseries, under certain Circumstances, and on 

 certain Conditions. By the Conductor. 



It is scarcely necessary to premise, that one of the causes why a greater va- 

 riety of trees and shrubs is not planted by country gentlemen is, the difficulty 

 of getting the different kinds true to their names ; and the almost certainty, 

 when a considerable collection is ordered, of receiving a number of plants of 

 the same species or variety under different names. This is more especially the 

 case under such genera as 'Magnolia, Cratae gus, Pyrus, Fraxinus, Quercus, 

 Pinus, Populus, Petula, &c. Another evil which the purchasers of trees 

 and shrubs have reason to complain of is, that the names of varieties are very 

 frequently inserted in catalogues as if they were species ; in consequence of 

 which, a person intending to have only a few species of a genus which contains 

 a great number might, instead of the few kinds which would have given him 



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