. The Artizan. e, condensers and scrubbersmaking the strongest ammoniacal liquor, purifiers of large capacity andsurface for the oxide system of purification, monster gasholders, and last,though not least, street mains of the dimension of small tunnels; these,and perhaps some other matters, are the concomitants of cheap gas, as in-augurated at the period above referred to- Subsequent events, however,have shown that at least one of the parties to the arrangement (the gasconsumers) have become dissatisfied with their bargain. An agitationwhich originated some years ago still continues for a repe
. The Artizan. e, condensers and scrubbersmaking the strongest ammoniacal liquor, purifiers of large capacity andsurface for the oxide system of purification, monster gasholders, and last,though not least, street mains of the dimension of small tunnels; these,and perhaps some other matters, are the concomitants of cheap gas, as in-augurated at the period above referred to- Subsequent events, however,have shown that at least one of the parties to the arrangement (the gasconsumers) have become dissatisfied with their bargain. An agitationwhich originated some years ago still continues for a repeal of the conditionas to quality, and the legislature has so far interfered as to raise consider-ably the standard of illuminating power; the important question presentsitself whether, in meeting this change, it may not be requisite to modifythe present mode of constructing gasworks, especially in those localitieswhere mixed coals are used for producing gas of the quality required bythese new regulations. pig ric. 6- A glance at the several sections of the retort settings will show theform and arrangements at present generally adopted. Fig. shows Lowes(Chartered) setting; Fig. 2, is Jones (Commercial); Pig. 3, is Evans(Westminster Chartered); Fig. 4, is Methvens (Imperial, St. Pancras);Fig. 5, is Gores (Valparaiso) and Fig. 6, is Hendersons superheated steamretort. In large works, and with clay retorts, the system of throughsetting, with double mouth-pieces, is unqestionably the most economical,both as regards fuel and durability. But this arrangement is open tograve objections. If the retorts are use for the generation of gas of highilluminating power, the increased surface over which the gas passes afterit is eliminated from the coal exposes it to the chance of decomposition,and the consequent deposition of its carbon. That this goes on to a verygreat extent is evident from the amount of solid carbon, or graphite, foundon the inner surface of the retorts. In through re
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