A Collection of Mathematical Rules and Tables Including Interest, Equation of Payment, Mensuration, Geometry, and Trigonometry, Rules for Calculating Diameter, Circumference, Area and Squaring the Circle : Together with the Metric System of Weights and Measures for Purveying Medicines and Other Official Purposes, Rules for Converting Terms of U.S. Apothecaries' Weights and Measures Into Their Respective Equivalents of the Metric System