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 15, 2024.

Pages

EXPERIMENT XIII.

HAving without the help of Iron Instru∣ments powder'd a black Load-Stone, and pour'd Spirit of Salt upon the fine Powder, it caus'd such an Ebullition, as usually succeeds the Effusion of that Liquor upon Filings of Iron, and likewise rais'd fetid Fumes: And being kept for about two Nights in Digestion, extracted a strong Tincture, being almost red, and not green, like that of Mars; yet would, like that of Iron, turn a Tincture of Galls black, which in several Positions would appear Blew. And to this I shall add, that a Solution of Load-Stones being made in Aqua Regia, the Tincture appear'd to be of a golden Colour.