Socius mercatoris: or The merchant's companion: in three parts. The first, being a plain and easie introduction to arithmetick, vulgur and decimal, the extraction of the square and cube roots, with a table of 200 square roots, and their use in the resolution of square equations. The second, a treatise of simple and compound interest and rebate, with two tables for the calculation of the value of leases or annuities, payable quarterly, the one for simple, the other compound interest, at 6 per cent. per annum, with rules for making the like for any other rate. The third, a new and exact way of measuring solids in the form of a prismoid and cylindroid, with the frustums of pyramids and of a cone: whereunto is added, some practical rules and examples for cask-gauging. By John Mayne, philo-accomptant.
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Title
Socius mercatoris: or The merchant's companion: in three parts. The first, being a plain and easie introduction to arithmetick, vulgur and decimal, the extraction of the square and cube roots, with a table of 200 square roots, and their use in the resolution of square equations. The second, a treatise of simple and compound interest and rebate, with two tables for the calculation of the value of leases or annuities, payable quarterly, the one for simple, the other compound interest, at 6 per cent. per annum, with rules for making the like for any other rate. The third, a new and exact way of measuring solids in the form of a prismoid and cylindroid, with the frustums of pyramids and of a cone: whereunto is added, some practical rules and examples for cask-gauging. By John Mayne, philo-accomptant.
Author
Mayne, John, fl. 1673-1675.
Publication
London :: printed by W[illiam] G[odbid] for N. Crouch, in Exchange-Alley, over against the Royal-Exchange in Cornhill,
1674.
Rights/Permissions
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Subject terms
Interest -- Tables -- Early works to 1800.
Interest rates -- Early works to 1800.
Cite this Item
"Socius mercatoris: or The merchant's companion: in three parts. The first, being a plain and easie introduction to arithmetick, vulgur and decimal, the extraction of the square and cube roots, with a table of 200 square roots, and their use in the resolution of square equations. The second, a treatise of simple and compound interest and rebate, with two tables for the calculation of the value of leases or annuities, payable quarterly, the one for simple, the other compound interest, at 6 per cent. per annum, with rules for making the like for any other rate. The third, a new and exact way of measuring solids in the form of a prismoid and cylindroid, with the frustums of pyramids and of a cone: whereunto is added, some practical rules and examples for cask-gauging. By John Mayne, philo-accomptant." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A50425.0001.001. University of Michigan Library Digital Collections. Accessed May 14, 2024.
Pages
Prop. II.
A Sum of Money = A, due at a certain time hereafter = t, at a certain Rate of Interest = G, per Cent. per Annum. Q. The pre∣sent worth = p?
Equation, p=〈 math 〉〈 math 〉
That is, the Fact of the Amount multiplied by the Principal, 100, in the Time, viz. 1 Year, divided by the said Principal multiplied into the said Time, more the Rate of Interest multiplied into the Time of Forbearance, the Quotient is equal to the present worth.
Example.
Quest. 1. If 248 l. 10 s. be due at the end of 7 years, what is it worth in ready money, discompting Interest, at 6 per Cent. per Annum.
descriptionPage 103
〈 math 〉〈 math 〉
The Answer is 175 l.
Quest. 2. If 950 l. be due at the end of 12 years, what is it worth in ready money, at 9 per Cent. per Annum Simple Interest?
〈 math 〉〈 math 〉
The Answer is 456 l. 14 s. 7 d. ¼ ferè.
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