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 230
eights to admit more or less air. By means of the notched uprights, the Fig. 25. sash may either be raised 6 in. above the box at top and bottom, or it may be raised 3 in. or 6 in. at the back, and not raised, or raised only 3 in., in front, so as to admit more or less air at pleasure, and yet… … Hand-Box, as a Substitute for a Hand-Glass.
