Abridgments of the specifications relating to preservation of food / printed by order of the Commissioners of Patents.

Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Abridgments of the specifications relating to preservation of food / printed by order of the Commissioners of Patents. Source: Wellcome Collection.

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    “ high a temperature as to burn the animal or vegetable matters in ££ the cases,” when following the operation in the manner described in the Specification of a Patent granted to John Wertheimer, February 8, 1840. The bath may consist ££ of a solution of muriate ££ of lime or nitrate of soda,” but a preference is given to muriate of lime, because a constant temperature of 270° or 280° Fahrenheit can be maintained ££ without much evaporation.” [Printed, 3d. See London Journal (Newton’s), vol. 21 (conjoined series), p. 442; Mechanics’ Magazine, vol. 35, p. 250; and Inventors’ Advocate, vol. 5, p. 178.] A.D. 1841, March 8.—N° 8874. WERTHEIMER, John.—The first part of this Specification is a repetition of N° 8378, but instead of a dry heat for the purpose of heating up the tins, a bath is to be employed, made with a solu¬ tion of muriate of lime or nitrate of soda, but the preference is given to the muriate of lime, because it can be maintained at 270° or 280° Fahrenheit “ without material evaporation.” [Printed, 3d. Mechanics’ Magazine, vol. 35, p. 250; and Inventors' Advocate, vol..5, p. 178.] » A.D. 1842, January 27.—N° 9240. BENJAMIN, Henry, and GRAFTON, Henry.—Preserving u animal and vegitable matters by freezing or cooling them.” A mixture of ice and salt in certain proportions, and pulverized, is preferred, ££ although other well-known freezing mixtures may be ££ resorted to.” ££ This invention is particularly applicable to ££ preserving fish.” ££ The fish intended to be frozen is placed ££ in a copper or other metallic vessel” with cold water, and this is deposited in a mixture of pulverized ice and salt, ££ the said £‘ mixture being in a wooden trough.” [Printed, 3d. See Repertory of Arts, vol. 18 (new series), p. 233; and London Journal (Newton's), vol. 22 (conjoined series), p. 303. A.D. 1842, April 6.—N° 9312. BEVAN, John.—Expelling the air from cases in which various articles of food are placed for preservation, by connecting the said cases with a vacuum chamber on the one hand, and with a vessel with gelatine or other suitable material on the other hand, in such manner that by opening the communications the air escapes into the exhausting apparatus, while the gelatine succeeds to supply its place. In all cases the gelatine cannot be used.
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