221. Iron flume. Racks and gate Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: May 21, 1846 Institution: University of Massachusetts Lowell, Center for Lowell History
222. Iron flume. Racks and gate Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: June 5, 1846 Institution: University of Massachusetts Lowell, Center for Lowell History
223. Kyanizing tank. Brick Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: March 28, 1887 Institution: University of Massachusetts Lowell, Center for Lowell History
224. Kyanizing tanks Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: June 6, 1848 Institution: University of Massachusetts Lowell, Center for Lowell History
225. Kyanizing tanks. Cistern connecting Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: June 8, 1848 Institution: University of Massachusetts Lowell, Center for Lowell History
226. Land in Lowell between Boston and Lowell Railroad Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: June 29, 1888 Institution: University of Massachusetts Lowell, Center for Lowell History
227. Map of Merrimack backyard Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: 1866 Institution: University of Massachusetts Lowell, Center for Lowell History
228. Map of Suffolk and Tremont mills Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: January 15, 1889 Institution: University of Massachusetts Lowell, Center for Lowell History
229. Massachusetts turbines. Apparatus for moving head gates Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: May 3, 1852 Institution: University of Massachusetts Lowell, Center for Lowell History
230. Math method for computing water flow Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: January 25, 1856 Institution: University of Massachusetts Lowell, Center for Lowell History
231. Mill #1 Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: July 9, 1853 Institution: University of Massachusetts Lowell, Center for Lowell History
232. Mill #1 Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: October 19, 1853 Institution: University of Massachusetts Lowell, Center for Lowell History
233. Mill #1. Apparatus for back gates Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: [ca. 1822–1952] Institution: University of Massachusetts Lowell, Center for Lowell History
234. Mill #1. Beams Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: January 5, 1854 Institution: University of Massachusetts Lowell, Center for Lowell History
235. Mill #1. Feeder pipes Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: July 22, 1853 Institution: University of Massachusetts Lowell, Center for Lowell History
236. Mill #1. Head of penstock Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: 1853 Institution: University of Massachusetts Lowell, Center for Lowell History
237. Mill #1. Shafting Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: November 30, 1853 Institution: University of Massachusetts Lowell, Center for Lowell History
238. Mill #1. Shafting in basement Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: [ca. 1822–1952] Institution: University of Massachusetts Lowell, Center for Lowell History
239. Mill #1. Turbines Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: August 6, 1853 Institution: University of Massachusetts Lowell, Center for Lowell History
240. Mill #1. Turbines Creator: Proprietors of the Locks and Canals on Merrimack River Format: Drawings/Illustrations Collection: Proprietors of Locks and Canals on Merrimack River Engineering Drawings Date: September 9, 1853 Institution: University of Massachusetts Lowell, Center for Lowell History