Excerpt from Key to Three Thousand Exercises in Arithmetic, and Appendix The results in interest at 6 per cent. In Secs. 3] and 32, where the time is years, months, and days, have been oh tained by multiplying by one-half of the months, and one sixth of the days, as directed in the Arithmetics of Vogdes, Walsh, Greenleaf, 850. It is thought proper to state this, for the information of teachers who, by employing other methods.

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