Canadian Niagara Power Glass Slide - Plan and Profile of Discharge Tunnel

Plan and profile of discharge tunnel along Niagara River. The horizontal scale is 1 inch = 100 feet, the vertical scale is 1 inch = 40 feet. The drawing is dated November 7, 1902.

Canadian Niagara Power Glass Slide - Sketch Showing Proposed Masonry Lining Near Portal of Tunnel

Drawing by consulting engineer dated October 19, 1901. Scale is noted as 1/4 inch = 1 foot.

Canadian Niagara Power Glass Slide - Drawing: Section thru Wheelpit

Drawing of "Section thru Wheelpit" dated September 1925. Shows unit no.1 through unit no.11, power house floor and water surface.

Canadian Niagara Power Glass Slide - Engineer Drawing (untitled)

Engineer drawing (untitled), some of the labels read "exciter chamber", "fore bay", "power house floor".

Canadian Niagara Power Glass Slide - Men in Tunnel

Four men (unknown) standing in the tunnel wearing hard hats.

Canadian Niagara Power Glass Slide - Large Group in Tunnel

A large group of men in hard hats in the tunnel. The names of the men are unknown.

Canadian Niagara Power Glass Slide - Four Men in Tunnel

Four men standing in hydro tunnel.

Johns-Manville (Canada) records, 1949-1977 (non-inclusive).

The Johns-Manville Company was founded in 1901with the merging of the H.W. Johns Manufacturing Company and the Manville Covering Company. Both companies made building materials using asbestos. The new company was based in New York, New York, and made products such as insulation and roofing materials, automotive sheet packing for cylinders, asbestos/cement, acoustical and magnesia products. Significant restructuring has occurred over the years as the company shifted from production of asbestos products to other types of building materials, such as fibre glass and forest products. Since 2001, the Johns-Manville Company has been owned by Berkshire Hathaway. The company began operations in Canada in 1918 in Asbestos, Quebec, where the Jeffrey Asbestos Mine was located. A Canadian plant opened in Port Union, Scarborough Township, in 1956, and another in North Bay, Ontario, in 1957. Both of these plants have since closed. The company currently has two plants in Canada, in Innisfail, Alberta, and Cornwall, Ontario.

Letter to S.D. Woodruff from A. Jeffrey importer of Hardware, Iron, Steel, and Window Glass of St. Catharines, Ont.

Letter to S.D. Woodruff from A. Jeffrey importer of Hardware, Iron, Steel, and Window Glass of St. Catharines, Ont. A. Jeffrey says that he will be able to supply Mr. Woodruff with glass and iron pipe, June 7, 1875.

Letter to S.D. Woodruff from A. Jeffrey importer of Hardware, Iron, Steel, and Window Glass of St. Catharines, Ont.

Letter to S.D. Woodruff from A. Jeffrey importer of Hardware, Iron, Steel, and Window Glass of St. Catharines, Ont. regarding breakage and freight, June 23, 1875.

Unsigned letter to A. Jeffrey written on an envelope stating that the glass was free from breakage, therefore there would be a deduction of 10 percent

Unsigned letter to A. Jeffrey written on an envelope stating that the glass was free from breakage, therefore there would be a deduction of 10 percent, June 28, 1875.

Receipt from Chance Brothers and Co. Glass Works near Birmingham, England

Receipt from Chance Brothers and Co. Glass Works near Birmingham, England regarding payment received for glass panes. This is accompanied by an envelope, April 6, 1875.

Note regarding cut glass prices

Note regarding cut glass prices, n.d.

Receipt from John R. Monro, Tea, China, Glass and Crockery House, St. Catharines

Receipt from John R. Monro, Tea, China, Glass and Crockery House, St. Catharines for kitchen items, shoes and mustard, April 12, 1887.

Receipt from Chatfield and Neelon, St. Catharines for freezer, glass globe and fixtures

Receipt from Chatfield and Neelon, St. Catharines for freezer, glass globe and fixtures, July 1, 1887.