A brief introduction to the infinitesimal calculus, designed especially to aid in reading mathematical economics and statistics, by Irving Fisher. Fisher, Irving, 1867-1947. Calculus. QA303 .F53 517.1 FIB New York, The Macmillan Co., 1897. 1897. 1897 Text vii, 84 p. http://hdl.loc.gov/loc.gdc/scd0001.00035067310 eng Also available in digital form on the Internet Archive Web site. Also available in digital form on the Internet Archive Web site.