Transactions of the Horticultural Society. 



421 



nificently. They are known as H. angustifolium, acuminatum, 

 aurantiacum, carneum, coccineum, coronarium [Jig. 121. b), 

 elatum (a), flavescens, flavum(c), gardneridmm, glaucum, 

 longifolium, maximum, spicatum, thyrsiflorum, villosum, ellip- 

 ticum. 



51. On blacking Garden Walls. By Mr. Charles Harrison, F.H.S. 



Wortley Hall, Yorkshire. 

 Coal tar is used as the colouring matter, and to prevent it 

 having a glossy, or shining surface, which would be prejudi- 

 cial to tender leaves and shoots, Mr. Harrison adds one pint of 

 linseed oil to each gallon of the tar. Two coats are neces- 

 sary on very rough walls ; and, when sufficiently dried$ the 

 trees are nailed up in their places. By this coat of colour, Mr. 

 Harrison says, the wall acquires 10° of heat more than the walls 

 not coloured, thus affording great assistance in maturing the 

 buds upon fruit-bearing shoots, and preventing the harbouring 

 of insects. — A contributor observes, that he has seen the loss 

 of entire crops of melons and cucumbers, by coating the 

 frames with tar, which we think worth mentioning to prevent 

 a practice attended with so much benefit, from being indis- 

 criminately applied. Lampblack, quicklime, a little cop- 

 peras, and hot water, will form a blacking much cheaper ; and 

 we think, as applied to masonry, with all the advantages of 

 tar, without any of its disadvantages. 



52. Account of a Plan for forcing Vines in Borders under Glass^ 

 By the Reverend Blakeley Cooper. A.M. Communicated by Sir 

 George Thomas Staunton, Bart. F.H.S. 



Mr. Cooper had for 

 many years forced vines 

 trained under glass 

 cases resembling melon 

 frames, with the aid of 

 stable dung only. The 

 border on which the 

 vines were planted 

 {fig. 122. a) was within 

 the frame, and raised 

 by means of cast-iron 

 joists, and Welsh 

 slates, over a cavity 

 which, from time to 

 time, was filled with 

 hot dung, through 

 openings in front (b). 



By these simple means he raised abundant and early crops. 



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