. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 154 THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. [April, small coal, (ar, pilch, or olher bituminous matter to a high temperature in a retort. Secondly, the peculiar construction of retorts for effecting the same ; and lastly, the application of an exhausting apparatus to such retorts, toge- ther «ith the introduction of air into re'.orts where fuel of the above de- scription is undergoing the process of drying. The patentee commences by staling that it is not necessary to ent
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 154 THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. [April, small coal, (ar, pilch, or olher bituminous matter to a high temperature in a retort. Secondly, the peculiar construction of retorts for effecting the same ; and lastly, the application of an exhausting apparatus to such retorts, toge- ther «ith the introduction of air into re'.orts where fuel of the above de- scription is undergoing the process of drying. The patentee commences by staling that it is not necessary to enter into any description of the manufac- ture, or mode of combining pilch, coal, tar, and other matter into fuel, as the invention does not apply to the compounding of such fuel; at the same time the inventor states that he prefers the compound of coal and bituminous matter to be as follows ; 15 per cent, of pilch and coal tar and 90 of small coal, in which may be employed a little "heavy oil" to the extent of from 2 to 5 per cent.; and in order to prevent smoke when such fuel is being consumed, about the same quantity of common salt may be added or alum dissolved in water. The mixture after being moulded into convenient sizes IS placed in a retort for six or eight hours, and subjected to a heat of from' 400° Fahr. and upwards, by uhich means gases and certain other matters are driven off, which, if permitted to remain, would produce prejudicial effects to Hhich sui-h fuel is said lo be subjected. The retorts, which are of the D form, are built of brick, and are provided with an aperture for the escape of gases, which pass off in the same manner as in the manufacture of gas into an hydraulic main, to which is connected a pipe leading to an exhausting apparatus, which consists of two cylindrical vessels suspended at each end of a beam, and inverted in a tank containiii" water, so that by raising and depressing the vessels in the water tank, the gases and vapours
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