Transactions of the Horticultural Society.^ 203 



to be shut down when the tan or earth was being removed, 

 &c. We may add, that it is an improvement to bevel the 

 walls which retain the dung linings (/), and it would 

 be a farther improvement to build these walls hollow, 

 in Silverlock's manner, (g) This practice of beveling walls 

 of dung-pits, was originally brought forward by Mr. Scot 

 (Encyc. of Gard. § 2655.), and has been successfully adopted 

 in several gardens. Dung linings, during the process of 

 fermentation, shrink from the sides, as well as sink from the 

 top ; the slope of the outer wall acts like a wedge in pressing 

 the linings to the walls of the bed, and every gardener 

 knows that much more heat 

 is given out by dung in 

 close contact with anybody, 

 than when from being in a 

 loose state a portion of air 

 intervenes. Where brick 

 pits are built above ground, 

 it might be worth while 

 to bevel the walls somewhat 

 inwards (fg. 61. a) for the 

 same reason, and lids which 

 might be hinged to the 

 frames (b) would be valu- 

 able in the winter season by 

 excluding rain and snow, 

 and in spring and summer by including moisture. 



36. On the Cultivation of the Passiflora Quadrangularis. By Mr. 

 William Mitcheson, Gardener to John Milf'ord, Esq. F.H.S. 

 Read October 18. 1825. 



Mr. M. keeps a plant in a box eighteen inches square, fixed 

 on a level with the curb in one corner of his tan-pit. The 

 sides of the box are perforated, to admit the roots to run 

 among the tan, and the shoots are trained like vines under 

 the rafters. In autumn the shoots are pruned back to within 

 two or three eyes of the old wood ; and in March following, 

 or just before the plant begins to break, the plant is taken 

 out of the box, the root and ball reduced, and repotted in 

 fresh compost. Abundance of water in the flowering season 

 enables the plant to set its fruit without artificial impregnation. 

 A strong plant will produce forty fruits in a season, in regular 

 succession, from the end of June to Christmas. Half that 

 number will grow to a larger size. 



