Specification of Thomas Harrison Granger and Jean Paul Louis Hyan : removing sewage gas.

  • Granger, Thomas Harrison.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Thomas Harrison Granger and Jean Paul Louis Hyan : removing sewage gas. Source: Wellcome Collection.

    4/4 (page 2)
    A.D. 1871.—N 1445. Provisional Granger ^ Hyan's Improved Method of Removmg Sewage Gas, the unnecessary suction of atmospheric air which would impair the strong draught in the system of sewers through the openings of the street sewers and the openings in closets and sculleries, all these openings are furnished with self-acting hermetic fastenings which are only opened when their respective pipes are to he used, and afterwards closed to 5 prevent the entrance of atmospheric air. The keys of the fastenings of the street sewers may he given to authorized persons, who can when required let the water into the sewers. We cause the waste steam of the working engine of the establishment for treating sewage to he let into the hefore-mentioned chimney hy means of a blast pipe in order 10 to increase the draught in the sewers. In order not to he entirely dependent on draught to draw ofiP the sewage gases we employ when required an air pump or blowing machine which draws the air out of the sewers and forces it through the grate of the furnace. LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen’s most Excellent Majesty. 1871.