The chemical principles of the metallic arts ; with an account of the principal diseases incident to the different artificers; the means of prevention and cure ; and a concise introduction to the study of chemistry / By W. Richardson.

  • Richardson, William, 1791-1863.
Date:
1790
Catalogue details

Licence: Public Domain Mark

Credit: The chemical principles of the metallic arts ; with an account of the principal diseases incident to the different artificers; the means of prevention and cure ; and a concise introduction to the study of chemistry / By W. Richardson. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

    291/322 (page 185)
    for giving a black colored glaze, which is compofed of twenty-one parts of white lead, five' parts of pow- dered flints, and three parts of manganefe. This is ufed for common earthen ware. On the CALCES and PRECIPITATES of MERCURY. MERCURY diflblved in the nitrous acid may be precipitated j Firft, Of a white color, by adding a folution of fal , ammoniac to the nitrous folution, and carefully pre- cipitating with a folution of fixed allcali. Secondly, Of a browniih red color, by precipitat- ing the nitrous folution with fixed alkali, or lime- water. Thirdlv, Of an orange color, with pure mineral alkali. Fourthly, Of a rofe color, with urine. Fifthly, Of a vermillion red, with Beguin's fpirit. Which is fulphur difTolved in caufbic volatile alkali, by the application of a digefting heat. Sixthly, Of a blue color, with Meyer's extraft of Berlin blue j which is the coloring matter of Pruffian blue extraded with volatile alkali. And Seventhly, I