Specification of John William Slater : treating sewage.

  • Slater, John William.
Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John William Slater : treating sewage. Source: Wellcome Collection.

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    Provisional ~ Slater's Improvements in Treating Sewage.______ obtained by precipitating sewage (either according to the process known as the “A, B, C, process,” or according to other processes) is carbonized for the purpose of obtaining therefrom a carbonaceous residue whicn is useful in purifying sewage and for other purposes. In carbonizing the said deposits according to the usual process the 5 volatile products of the destructive distillation are either allowed to escape into the open air or are passed into the furnace. Now my Invention consists in utilizing the said volatile products, or some of them, as herein-after described. I pass the said volatile products from the retort through condensing 10 and purifying apparatus similar to that in use in gasworks, and thus obtain ammonia, tarry or oily products, and illuminating gas, the illumi¬ nating power of which may he increased by passing it through volatile hydrocarbons, as is done with other illuminating gas. SPECIFICATION in pursuance of the conditions of the Letters Patent, 15 filed by the said John William Slater in the Great Seal Patent Office on the 21st April 1876. TO ALL TO WHOM THESE PRESENTS SHALL COME, I, John William Slater, of No. 2, Tamworth Terrace, in the County of Middlesex, Analytical Chemist, send greeting. 20 WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters Patent, bearing date the Twenty-first day of October, in the year of our Lord One thousand eight hundred and seventy-five, in the thirty-ninth year of Her reign, did, for Herself, Her heirs and sue- w cessors, give and grant unto me, the said John William Slater, Her 25 special license that I, the said John William Slater, my executors, administrators, and assigns, or such others as I, the said John William Slater, my executors, administrators, and assigns, should at any time agree with and no others, from time to time and at all times there¬ after during the term therein expressed, should and lawfully might BO make, use, exercise, and vend, within the United Kingdom of Great