Specification of Francis Gerard Prange and William Whitthread : utilizing sewage.

  • Prange, Francis Gerard.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Francis Gerard Prange and William Whitthread : utilizing sewage. Source: Wellcome Collection.

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    J?range 8f Whitthread's Improvements in Utilizing Sewage. Lord One thousand eight hundred and seventy-two, in the thirty-fiftli year of Her reign, did, for Herself, Her heirs and successors, give and grant unto us, the said Prancis Gerard Prange and William Whitthread, Her special licence that we, the said Prancis Gerard Prange and William 5 Whitthread, our executors, administrators, and assigns, or such others as we, the said Prancis Gerard Prange and William Whitthread, our executors, administrators, and assigns, should at any time agree with, and no others, from time to time and at all times thereafter during the term therein expressed, should and lawfully might make, use, exercise, 10 and vend, within fche United Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for “ Improvements in the Utilization op Sewage,” upon the condition (amongst others) that we, the said Prancis Gerard Prange and William Whitthread, our executors or administrators, by an instrument in writing under our, or their, or 15 one of their hands and seals, should particularly describe and ascertain the nature of the said Invention, and in what manner the same was to he performed, and cause the same to he filed in the Great Seal Patent Office within six calendar months next and immediately after the date of the said Letters Patent. 20 NOW KNOW YE, that we, the said Prancis Gerard Prange and William Whitthread, do hereby declare the nature of our said Inven¬ tion, and in what manner the same is to be performed, to he particularly described and ascertained in and by the following statement, that is to say:— 25 Our Invention consists,— Pirst. In adding to and mixing with liquid sewage a solution of di-calcic phosphate in an aqueous solution of mono-calcic phosphate with an alkaline earth or alkali, say lime, so as to precipitate the nitro¬ genous and manurial matters held in solution and suspension. 30 Second. In adding with the above-mentioned chemicals, when there is an excess of free ammonia, magnesium salts. The said chemical substances may be added to the sewage (A) in depositing enclosures whilst the sewage is flowing through at a slow rate, (B) in settling reservoirs, or (C) in the sewer close to the depositing 35 enclosures or settling reservoirs. The addition is best effected under head C, because thereby thorough admixture is secured; a mixing agitator may be used if desired.
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