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A New Art Or The Lightning Interest Rules

Reduce the whole time to

months and set it down in figures; divide the number of days by three,

and set the quotient down to the right of the months, and multiply that

by the quotient of the money divided by two; the answer will be the

interest at six per cent. To change to any other rate, multiply the

interest by it and divide by six. $160--one year, seven months,

twenty-one days, at six per cent. $160--2--$80 x 197--$15.76 at 6.

Parties in New York are teaching this rule at $5 a scholar.