. The book of the garden. Gardening. square, hollowed out at the top and bot- tom sides, so as to move on the rounded projections on Fig. 337. the tiles above and below it: d is the door of the furnace, also of fire-tile, and suspended from the pul- ley e by means of a round vul- canised India- rubber belt. The arrange- ment will be better seen in fig. 339. This door slides in two grooves in the side bricks, as seen in the elevation. Fig. 338 is the eleva- tion, showing both furnace and ash-pit door, slid- ing horizon- tally upon Sylvester's principle. Fig. 339 the eleva- tion showing the furn
. The book of the garden. Gardening. square, hollowed out at the top and bot- tom sides, so as to move on the rounded projections on Fig. 337. the tiles above and below it: d is the door of the furnace, also of fire-tile, and suspended from the pul- ley e by means of a round vul- canised India- rubber belt. The arrange- ment will be better seen in fig. 339. This door slides in two grooves in the side bricks, as seen in the elevation. Fig. 338 is the eleva- tion, showing both furnace and ash-pit door, slid- ing horizon- tally upon Sylvester's principle. Fig. 339 the eleva- tion showing the furnace door suspen- ded by a pulley, and opening ver- tically, while the ash-pit door opens horizontally. Williams s improved or Argand furnace. —This furnace is founded upon the prin- ciple of the Argand lamp ; and although sufficiently ingenious and creditable to the inventor, has not been found to act very satisfactorily in practice. In " The Gardeners' Chronicle," an anonymous correspondent, in criticising this furnace, makes the following remarks in regard to its effects :—" In the annexed diagram we have shown how simply and easily the benefits, real or supposed, of the contri- vance in question may be obtained in furnaces resembling those generally used for horticultural purposes. The aperture in the brickwork marked by four arrows, which indicate the course of the entering Fig. current of air, are the only novelties; and they are new only in this peculiar ar- rangement ; because, as we have already stated, air has been admitted behind the fire for the same purpose for very many years. In this arrangement, the air which enters by the four channels meet- ing the current of gas at right angles, or rather, indeed, opposed to it, would tend to produce that forced intermixture Fig. 340. Whic\ .is secured m the turpen- tine lamps by the pecu- liarly form- ed chimney, and the de- flecting but- ton placed over the ; The four arrows show the direc
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectgardening, bookyear18
