Specification of William Edward Newton : preparing hydrate of magnesia.

  • Newton, William Edward.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Edward Newton : preparing hydrate of magnesia. Source: Wellcome Collection.

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    Provisional Newton's Improved Process for Preparing Hydrate of Magnesia. denominates “ milk of magnesia.” This is effected by causing a solution of ammonia to act on and decompose any suitable soluble salt or com¬ pound of magnesia, so as to precipitate all the magnesia in the form of an hydrate. The magnesia compounds which it is preferred to use for the purposes 5 of the Invention are the chloride or the sulphate. The magnesian salt should be dissolved in water, and the solution of ammonia may then bo added gradually, during which time the mixture must be kept constantly stirred in order to prevent coagulation. The ammonia is added until complete reaction has taken place, and the magnesian salt has become 10 perfectly decomposed. The mixture is then to be allowed to stand for twenty-four hours, more or less, to settle, when the supernatant liquor may be drawn off. The residuum or precipitate consisting of a hydrate of magnesia is then washed repeatedly until the product is rendered pure. 15 SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by the said William Edward Newton in the Great Seal Patent Office on the 20th November 1874. TO ALL TO WHOM THESE PRESENTS SHALL COME, I, William Edwaud Newton, of the Office for Patents, 66, Chancery Lane, in the 20 County of Middlesex, Civil Engineer, send greeting. WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters Patent, bearing date the Twenty-first day of May, in the year of our Lord One thousand eight hundred and seventy-four, in the thirty- seventh year of Her reign, did, for Herself, Her heirs and successors, 25 give and grant unto me, the said William Edward Newton, Her special licence that I, the said William Edward Newton, my executors, admini¬ strators, and assigns, or such others as I, the said William Edward Newton, my executors, administrators, and assigns, should at any time agree with, and no others, from time to time and at all times thereafter during 30 the term therein expressed, should and lawfully might make, use, exercise, and vend, within the United Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for “ An Improved