The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.

About this Item

Title: The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.
Author: Boyle, Robert, 1627-1691.
Publication: London :: Printed for J. Phillips ... and J. Taylor ...,; 1699-1700.
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Subject terms: Physics -- Early works to 1800.; Chemistry -- Early works to 1800.; Medicine -- 15th-18th centuries.
Link to this Item: http://name.umdl.umich.edu/A28936.0001.001
Cite this Item: "The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A28936.0001.001. University of Michigan Library Digital Collections. Accessed June 7, 2024.

Pages

EXPERIMENT XXXVII.

SPirit of Salt pour'd on a Solution of Co∣chinele, or the Juice of black Cherries, ren∣ders their Colours clearer; but turns an Infu∣sion of Brasil yellow, the Acid Liquor in both weakening the Spirit on which it falls; for as Crimson is a Red with an Eye of blew, so Yel∣low is but a dilated Red; and therefore Alka∣lizated Salts, will not only restore the Infusion of Cochinele and Brasil to Crimson, but will turn the yellow Juice of Madder red, and an Infu∣sion of Brasil to a Crimson. And here it may be worth while to consider, why Blew and Purple seem to bee deeper Colours than Red; and therefore the Juices of Plants of either of the two former Colours, may be turn'd red by Spirit of Salt, or Aqua Fortis; yet Syrup of Vi∣olets, should be, on the contrary, turn'd green by Oyl of Tartar and Spirit of Urine, which is a more dilute Colour than Blew.