Thesaurarium mathematicae, or, The treasury of mathematicks containing variety of usefull practices in arithmetick, geometry, trigonometry, astronomy, geography, navigation and surveying ... to which is annexed a table of 10000 logarithms, log-sines, and log-tangents / by John Taylor.
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Title
Thesaurarium mathematicae, or, The treasury of mathematicks containing variety of usefull practices in arithmetick, geometry, trigonometry, astronomy, geography, navigation and surveying ... to which is annexed a table of 10000 logarithms, log-sines, and log-tangents / by John Taylor.
Author
Taylor, John, mathematician.
Publication
London :: Printed by J.H. for W. Freeman,
1687.
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Subject terms
Mathematics -- Early works to 1800.
Cite this Item
"Thesaurarium mathematicae, or, The treasury of mathematicks containing variety of usefull practices in arithmetick, geometry, trigonometry, astronomy, geography, navigation and surveying ... to which is annexed a table of 10000 logarithms, log-sines, and log-tangents / by John Taylor." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A64224.0001.001. University of Michigan Library Digital Collections. Accessed May 1, 2024.
Pages
PROP. II.
To find the Logarithm belonging to a Vulgar Fraction, and a Mixt number.
First as is before shewed if it be a Vulgar Fraction, find the Log. of the Numerator, and the Log: of the Denominator, then substract the Log: of the Numerator, from the Log: of the Denominator, the remainder is the Log: of the Fraction propounded: Now if you would find the Logarithm of 5/7, do as is prescribed whose Log. I find to be 0. 146121, Now to find the Log. of a Mixt Number, reduce it into an Improper Fraction, and then do as before, so the Log of 15 ⅖, Improper 77/5;, is 1, 187, 52, and so do for any other Mixt number.