8 A new Dendrometer. 



opening the top apertures, and when the. fire is nearly out 

 shutting in the warm air. The space between the two walls 

 will be useful for holding plants in pots, which are in a dor- 

 mant state, and which it may be requisite to preserve from the 

 frost or wet, as strawberries. Dung may also be fermented 

 there for forcing sea-kale, rhubarb, &c. I do not intend the 

 wall to have a direct south aspect, but to have it turned half 

 round to the east, so that both sides will be available for fruit 

 trees ; in this case much more so than if the wall had been 

 perpendicular. The walls are built on arches, so that the 

 space between will be occupied by the roots of the fruit trees. 

 Adverting to Mr. Knight's observation in a late part of the 

 Horticultural Transactions (vol. vi. part ii. reviewed in Gard. 

 Mag. vol. i. p. 424.), I mean to contrive to plant some of the 

 half standards within the interior space, bringing out the stems 

 at six feet high (b), in order to afford them protection from the 

 late frosts when the sap is rising, and which he so well shows 

 to be prejudicial to the fecundity of fruit trees. 



I am, Sir, &c. 

 Bristol, March 21. 1826. J. A. B. 



As a south and north wall, to be covered with canvass (c) when 

 the trees are in blossom, this plan may succeed ; but 

 we think it can hardly be worth while to plant the 

 trees (b) inside. If their stems are to be protected, a 

 small recess in the brickwork {Jig. 2.) would answer 

 as well, and no danger of injury from the fermenting 

 dung (d) would be incurred. But what becomes of ,©.. 

 the stems of trees against common walls ? The best 

 thing for such a wall would be a covering of glass, at 

 a foot or eighteen inches' distance (c), and opening 

 and removable at pleasure. — Cond. 



Art. III. Description of a Dendrometer invented by Mr. 

 Arch. Gorrie, C.M.H.S. Gardener at Annat Gardens, Perth- 

 shire. By Mr. Gorrie. 



A lofty tree is a noble object of contemplation, clothed 

 with an air of grandeur, magnitude, and antiquity, which leads 

 the mind back to the " days of other years," in all the rich 

 luxuriance of fancy. The pleasing emotion, however, receives 

 sometimes a temporary check, when a consciousness of uncer- 



