. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. over-flow of the hydraulic main and otherplaces may be stored. The tar wellis usually a brick or cast-iron tank,into which a branch pipe from themain is inserted and sealed in astationary lute at the bottom. Stillfurther to separate all condensablevapours before allowing the gas topass to the purifiers, a set of con-densers or coolers is provided, throughwhich the gas is made to circulateuntil it is reduced to a temperaturebearing some approximation to thatof the surrounding atmosphere. As has been describ
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. over-flow of the hydraulic main and otherplaces may be stored. The tar wellis usually a brick or cast-iron tank,into which a branch pipe from themain is inserted and sealed in astationary lute at the bottom. Stillfurther to separate all condensablevapours before allowing the gas topass to the purifiers, a set of con-densers or coolers is provided, throughwhich the gas is made to circulateuntil it is reduced to a temperaturebearing some approximation to thatof the surrounding atmosphere. As has been described in thisDictionary, condensers in most cases are formed by rows of upright pipes resting on a chest &tthe bottom, which acts as a receiver for condensed matter. Sometimes the pipes are concentric,as in those shown in elevation, Fig. 1376, the gas passing in the annular space, and the centreis either open to the atmosphere or supplied by a constant run of cold water. Another veryeffective condenser is simply an oblong narrow chest, the width being no greater than the main 682 GAS, MANUFACTURE OF. pipe by which it is supplied. It is usually set up on its narrow base, and the inside divided bypartitions of wood in such a way as to make the gas traverse several times through the entire heightbefore making its exit at the opposite end to that at which it had entered. The face plates arethickly studded with sockets, through which 2-in. pipes are passed and tightly pointed at bothsides, and these, breaking and retarding the gas in its passage, and being kept cold by a draughtof air continually passing through them, expose the gas in a comparatively limited space to animmense area of condensing surface. Ten sq. ft. of surface for every 1000 cub. ft. manufactured in twenty-four hours, is generallyrecognized as sufficient for condensation; but strictly, cannel requires greater condensing area thancommon gas. Without attaching too much importance to this part of the apparatus, it
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
