Catalogue of the collections / Comp. by E.M. Holmes.

  • Pharmaceutical Society of Great Britain. Museum
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Catalogue of the collections / Comp. by E.M. Holmes. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    Colouring Principles. 626. Isatin. C16 H10 N2 04. a. Deep red prismatic crystals. Note.—Prepared by treating indigo with sulphuric acid and bichromate of potassium. 627. Anilic Acid. C7 H5 N 05. a. White crystalline powder. Note.—Formed by the action of boiling nitric acid on indigo. 628. Anthranilic Acid. C7 H7 N Oo. (Phenyl-Carbamic Acid, Carbanilic Acid.) a. White powder. 629. Litmus. a. Deep blue angular fragments. Note.—Obtained from Eoccella fuciformis, E. tinctoria, and R. Mon- tagnei. See Mat. Med. Catalogue, p. 160, No. 133. 630. Alizarin. C14 H8 04. a. Bright red acicular crystals. Note.—This specimen was prepared by sublimation. 631. Purpurin. C14 H8 05. a. Dark red acicular crystals. Note.—Obtained from madder by treatment with alum and sulphuric acid. 632. Garancin. a. Purplish powder. Note.—Produced by the action of sulphuric acid upon madder. 633. Hematoxylin. C16 H14 06. a. Small lumps consisting of radiating prismatic crystals. Note.—Obtained from logwood. See Mat. Med. Catalogue, p. 36, No. 194. 634. Purree. (Indian Yellow.) a. Yellow amorphous pieces. Note.—This substance is said to be made from camel's urine. It is used in oil, and water-colour painting. It is stated to be a magnesia salt of euxanthic acid. See P. J. [1] , vol. iv., p. 417. 635. Chrysammic Acid. C14 H8 N4 012. a. Yellow powder. Note.—Obtained by the action of nitric acid on aloes. 636. Chrysammate of Potassium. K 07 H N3 06. a. Dark brown crystalline powder. Note.—The crystals have a greenish metallic lustre, like that of murexide.