File:The art of dying wool, silk, and cotton (1789) (14781574004).jpg

Identifier: artofdyingwoolsi00hell (find matches)
Title: The art of dying wool, silk, and cotton
Year: 1789 (1780s)
Authors: Hellot, Jean, 1685-1766 Macquer, Pierre Joseph, 1718-1784 Lepileur d'Apligny
Subjects: Dyes and dyeing
Publisher: London: Printed for R. Baldwin
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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Text Appearing Before Image:
he blue. It is even polTible to dyeboth in the fame liquor. K k 4 Ohfervations 504 THEARTOF Ohfervations on this Dye,Gode, in the year 1770, prefented a me- M. • moir to the Academy of Sciences atRouen, in which he pretended, that by pour-ing vitriolic acid on this fecula, he produced acombination of the indigo with the vitriolic acid.The appearance of the Saxon blue liquor, inwhich the feculae arc fufpended, but not dif-folved, is alone fufficient to prove the contrary.Whatever he may ftill fay, it makes no difference,nor does it make any exception to the propertyof acids, by which blue dies, and vegetableviolet are changed to a red, becaufe it is noton fecula fuch as indigo that acids produce thischange, but rather on vegetable juices, thecolour of which depends on the falts and eflentialoil of the plant. See M.GeofFroys memoir inthe Tranfa<5tions of the Royal Academy ofSciences. \ FINIS. D. H. HILL LIBRARYNorth Carolina State Coilege .i«!^ ^•i! Dying Silk . I i J J -t^6Fut.
Text Appearing After Image:
Explanation of the Plates which hclong to thedying of Silk. PLATE I. Figure I. Reprefents two great Coppers, one round, and theother oblong, fet in brick-work on their furnacei. A, An oblong Copper, called by the Dyers Ova/. B, A round Copper. C, The Scuttle of the Chimney. D, The Door of the Furnace, below the level of the Dyc- l^oufe. E, Steps down to the Furnace. F, The leaden Pipe by which the water is conveyed to the Copper. G, Cocks placed above each Copper, by means of which they are fiiledwith water. Fig. 2. Reprefents the plan of the Coppers, and of the Chim-ney ferving the two Coppers of fi?. I. A, Plan of the round Copper. B, Plan cf the long, or oval Copper. C, Stoppers of the Furnaces. D, Space under the Chimney, before the Furnaces. E, Steps down to the furnace. Fig. 3. Reprefents the Sedion of the round Copper; of itsFurnace, and Chimney. A, The infide^f the round Copper. B, The infide of the Furnace under this Copper, C, Door of the furnace. D, Infide of the Chimney. Eartofdyingwoolsi00hell

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