Fleta minor the laws of art and nature, in knowing, judging, assaying, fining, refining and inlarging the bodies of confin'd metals : in two parts : the first contains assays of Lazarus Erckern, chief prover, or assay-master general of the empire of Germany, in V. books, orinally written by him in the Teutonick language and now translated into English ; the second contains essays on metallick words, as a dictionary to many pleasing discourses, by Sir John Pettus ... ; illustrated with 44 sculptures.
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Title
Fleta minor the laws of art and nature, in knowing, judging, assaying, fining, refining and inlarging the bodies of confin'd metals : in two parts : the first contains assays of Lazarus Erckern, chief prover, or assay-master general of the empire of Germany, in V. books, orinally written by him in the Teutonick language and now translated into English ; the second contains essays on metallick words, as a dictionary to many pleasing discourses, by Sir John Pettus ... ; illustrated with 44 sculptures.
Author
Ercker, Lazarus, d. 1594.
Publication
London :: Printed for the author, by Thomas Dawks ...,
1683.
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Subject terms
Assaying -- Early works to 1800.
Metallurgy -- Early works to 1800.
Cite this Item
"Fleta minor the laws of art and nature, in knowing, judging, assaying, fining, refining and inlarging the bodies of confin'd metals : in two parts : the first contains assays of Lazarus Erckern, chief prover, or assay-master general of the empire of Germany, in V. books, orinally written by him in the Teutonick language and now translated into English ; the second contains essays on metallick words, as a dictionary to many pleasing discourses, by Sir John Pettus ... ; illustrated with 44 sculptures." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A54597.0001.001. University of Michigan Library Digital Collections. Accessed May 16, 2024.
Pages
descriptionPage 292
CHAP. III. How to prove an undefty, Lead-Oar for Lead.
BUT the right lead Oars (which have with them some flint, or other harsh stuff) they prove thus: Beat the lead Oar into pieces, as small as grains of hemp, and weigh of them 2 centners, and set them in an Assay test in a proof Oven, and roast them, but make it not too hot at first, that it may not run together like Sinders (and do just as is above mentioned with the Copper-proof) then grind the roast-Oar very small, mingle it with the fluss (cove∣red with salt) and you need no filed Iron to this, for it hath two contrary Sulphurs which consume one another, so that the lead will remain sure, then boyl the proof in the little oven before the bellows (as before) thus the lead will be right in the proof.