Publisher's Synopsis
Excerpt from Henderson and Hamlin's Lightning Calculator: Containing the Shortest, Simplest, and Most Rapid Method of Computing Numbers, Adapted to All Kinds of Business, and Within the Comprehension of Every One Having the Slightest Knowledge of Figures
In the addition of long columns of figures, which frequently occur in books of accounts, in order to add them with certainty, and, at. The same time, with ease and expedition, study well the fol lowing method, which practice Will ren der familiar, easy, rapid, and certain.
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