The gardener's magazine and register of rural & domestic improvement (1826)
Loudon, J. C. (John Claudius), 1783-1843, A. & R. Spottiswoode, printer, United States. Patent Office. Scientific Library, former owner DSI · London : Longman, Rees, Orme, Brown and Green · leaf 411
Exotic Nursery, Kings Hoad, May 18. 1840. Art. V. Description of an Instrument used for taking the Heights ofTrees. By H. W. Jukes, Esq. In the autumn of 1836 I spent several months at StudleyRoyal, in Yorkshire, the residence of Miss Lawrence, makingportraits of trees for the Arboretum… … to an inch. This instrument consists of a thin board of oak,2 ft. 9 in. long, shaped like a gun-stock, the end a being adaptedfor the shoulder, the muzzle or line b c for taking a sight ofthe top of the tree, and the square, of which c d\s o, side, beingmarked or cut on the board at the farther…