Canals -- United States

This collection consists of various papers including: paper correspondence between Watson and Col. Troup, newspaper clippings, and information about canals and constructing canals.

This collection consists of letters written in February and March of 1849 in support of the candidacy of George D. Stillson for the office of resident engineer for the Genesee Valley Canal.

A collection of about 106 mounted albumen prints created by George W. Rafter, a practitioner of high-powered photomicrography. In addition are a report by Rafter documenting his work and a modern reprint of an article he wrote for the Society of Microscopists. Plates 1-88 are described by a detailed inventory in folder 1; the descriptions here are abbreviated. Items 89-106 are smaller format prints, solely described from notes on the items themselves. Dated materials are from 1888.

This collection consists of 4 ledger books used for calculations and other design work on the second Erie Canal aqueduct at Rochester, New York by Matthew M. Hall. The ledgers date between 1836 and 1842.