A method to multiply or divide any number of figures : by a like or a less number, so expeditely, that any fifty figures may either be multiplied or divided by any fifty figures, all in one line, in five minutes time. ... Invented by Quin Mackenzie-Quin, ...

Bibliographic Details

Main Author:	Quin, Quin Mackenzie
Format:	eBook
Language:	English
Series:	Eighteenth century collections online.
Online Access:	Full text online