Modern Gasworks Practice

192 MODERN GAS WORKS PRACTICE Norwich Chambers At a time before the merits of the fully charged horizontal retort were realized, Mr. Thos. Glover introduced. at Norwich, a special form of semi-chamber horizontal retort. These chambers, wliich were 21 feet long, 3 feet high, and 1 foot wide, were fully charged by means of a de Brouwer projector. The average coal charge amounted to 21 cwts., and was distilled for a period of twelve hours. Compared witli partly filled horizontals the results were a decided improvement, but it was eventually found that heavily charged horizontal retorts of the normal size gave equally satis-factory yields, and the system was ultimately abandoned.