Pearce, Richard, 1874 Box 1 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series I: Correspondence, 1868-1901
Pennsylvania Rail Road Co., 1885 Box 1 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series I: Correspondence, 1868-1901
Perry, R.S., 1895 Box 1 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series I: Correspondence, 1868-1901
Potter, William Bleeker, 1889-1893 Box 1 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series I: Correspondence, 1868-1901
Printed Ephemera 2 folders Box 1 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series II: Research and Documents, 1868Egleston, Thomas
Proceedings of the American Metrological Society, 1873 Box 2 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series III: Metric System Materials, 1893-1895Documents and Pamphlets Related to the Metric System
Proposed U.S. Standard Gauges 3 folders Box 2 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series III: Metric System Materials, 1893-1895Documents and Pamphlets Related to the Metric System
Prosser, Thomas, 1876 Box 1 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series I: Correspondence, 1868-1901
Relation of Proposed Metric and Mechanical Engineers 2 folders Box 2 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series III: Metric System Materials, 1893-1895Documents and Pamphlets Related to the Metric System
Report of Charles W. Stone on Metric System Box 2 Rare Book & Manuscript Library Thomas Egleston papers, 1857-1901Series III: Metric System Materials, 1893-1895Documents and Pamphlets Related to the Metric System