An account of the rotula arithmetica invented by Mr. George Brown.

About this Item

Title
An account of the rotula arithmetica invented by Mr. George Brown.
Author
Brown, George, 1650-1730.
Publication
Edinburgh :: Printed for the author,
1700.
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Subject terms
Arithmetic -- Early works to 1800.
Geometry -- Early works to 1800.
Cite this Item
"An account of the rotula arithmetica invented by Mr. George Brown." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A29742.0001.001. University of Michigan Library Digital Collections. Accessed May 22, 2024.

Pages

6th. EPAMPLE.

At 5½ per Cent, what will 347 lib. 13 sh. 4 d. pay per Annum?

In this lesson, observe, that tho' all the Numbers be of one Denomination or kind of things, yet (the 5½ L. falling under a different Notion, to wit, that of Interest; whereas the other two, to wit, the Cent. or 100, and 347 L. 13sh. 4 d. are Principal Summs) the 5½ is the Singular Number, and so 100 is the Divisor.

〈 math 〉〈 math 〉

Page 79

In this you have 6 Decimals in the Answer to wit, four for those of the Coe∣fficients, and two for the Cyphers of the Divisor.

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