. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. ill their choice of what kind of boiler to adopt in the erection of new works then contemplated by them. The following figure re]ircscnts a longitudinal section through the centre of the boiler, furnace and cbiiuney, in all respects proportional exrept as to length, wliicli is to a scale of on"-lialf of that for the depth and width, and fig. 2 represents a plan, or bird's-eye view, of tlie furnace, flame lied, chimney, &c., supposing the boiler to be removed: and the
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. ill their choice of what kind of boiler to adopt in the erection of new works then contemplated by them. The following figure re]ircscnts a longitudinal section through the centre of the boiler, furnace and cbiiuney, in all respects proportional exrept as to length, wliicli is to a scale of on"-lialf of that for the depth and width, and fig. 2 represents a plan, or bird's-eye view, of tlie furnace, flame lied, chimney, &c., supposing the boiler to be removed: and the same letters refer to the same parts in both figures. The boiler is bung upon east-iron brackets, rivetted to its sides a little above the centre, and with broad flanges resting upon the top of the side walls, as is shown in the cross sec- tions, figures ?> and 4. It is fixed in an inclined position, or with a fall of about S inches to the front, so that by far the greatest proportion of the water is brought immediately over the furnace, as is shewn in fig. 1. A is the fire-grate with the ordinary furnace bridge at the end of it, only that the latter is provided with a longitudinal aperture, about 2 inches wide, communioating by a channel at its bottom, with the external air at E, and ]irovided with a valve, so that the smoke could be consumed upon Parkes's princijile, if necessary. lint in ad'Ution to this, there is also another bridge 1!, at about half the length of the boiler, which divides the flame bed into two chambers C C. The damper jilate D, is hung by side rods in tlie short passage leading to the chimney, which is the only part that can be pro- perly called a flue. The damper is inverted, or made to open downwards, so that the current of smoke or hot air is made to pass over instead of under it. The octagonal chimney is 30 yards high and 3 feet wide inside at the Kig. top, and intended to be large enough for two such boilers, which it evi- dently is. The foll
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