Modern Gasworks Practice

RETORT-BENCH APPURTENANCES 269 from head-quarters, or tlie apparatus may be set up adjacent to the retort house, in tlie valve-room, or in any otter convenient spot. It will be seen that the series of gauges not only gives a dead-beat indication of all conditions prevailing at the moment, but it also gives a record of the work over twenty-four hours. Probably 110 gas engineer will gainsay the faet that inconsistent quality of gas < TOGAS GOVERNOR Fig. 187.—Generat, Arrangement of the Reflux Pkbssuke System. and the temporary appearance of a high, proportion of inerts is due to overpulling by opening out 011 the retort-house governor. Moreover, the frequent alterations of “ draw ” made during the day give rise to an inconsistency of quality, more particu-larly as those in charge of governor have usually a predisposition to carry as high a “ draw ” as possible. Again, adjustments of the retort-house goveraors usually