[Article] The first century of the republic. (Fifteenth paper.) Scientific progress. I.–The exact sciences. (Concluded.) Adjust Share By Frederick A.P. (Frederick Augustus Porter) Barnard, This article is only available as a PDF to subscribers. Download PDF Tags 19th century Benjamin Franklin Charles S. s Chemistry Electricity Experiments Heat Henry s History John William Draper Joseph s Lewis M. s Light Microscopy Photography Scientists Spectrum analysis United States Zoology More from Frederick A.P. (Frederick Augustus Porter) Barnard The first century of the republic. (Fourteenth paper.) The progress of the exact sciences. Adjust Share Close < Previous Issue | View All Issues | Next Issue > January 1876 < Previous Issue | View All Issues | Next Issue > Table of Contents Close