Gideon Sundback fonds, 1942, 1952, 1985-1986, 1991, 2004, n.d.

Gideon Sundback was born in Stockholm, Sweden in 1880. He was educated as an engineer and settled in the United States in 1905. While working for the Universal Fastener Company, New Jersey in 1913 he developed and patented a “separable fastener”, which improved on an earlier version of what today is known as the zipper. He later moved his family to Meadville, Pennsylvania and sought a Canadian location for the production of his new invention. He settled on St. Catharines as it was an easy commute from his Pennsylvania home and opened The Lightning Fastener Company on Niagara Street. Sundback died on June 21, 1954 and is interred in Meadville, Pennsylvania. The plant continued to operate, but with increased foreign competition the manufacture of the zipper declined. The plant closed in 1981. Source: The St. Catharines Standard, July 3, 2004 Harold Fox was a noted lawyer, academic, businessman, author and a leading authority on intellectual property. He was engaged by Gideon Sunback and the Lightening Fastening Company to combat patent infringements by Colonial Fastener in the 1930s. The relationship continued when Fox was asked to become the managing director of the company, which he did until 1949. Fox lived in St. Catharines at his home “Foxcroft” until his death in 1969. Source: http://thefoxfund.com/harold.htm (November 2, 2009)

Canadian Niagara Power Glass Slide - Engineer Drawing of Sections of Discharge Tunnel

Consulting Engineer drawing of Sections of the Discharge Tunnel. Included in the drawing is the "cross section of tunnel with timbering" and "longitudinal section showing Timber in straight tunnel". Dated October 1902.

Canadian Niagara Power Glass Slide - Engineer Drawing Hydro Station

Appears to be an engineer's drawing of the Hydro Station. It is a cross-section view of the interior.

Canadian Niagara Power Glass Slide - Engineer Drawing (untitled)

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

The salvo combat model with area fire

This paper analyzes versions of the salvo model of missile combat where area fire is used by one or both sides in a battle. While these models share some properties with the area fire Lanchester model and the aimed fire salvo model, they also display some interesting differences, especially over the course of several salvos. Whereas the relative size of each force is important with aimed fire, with area fire it is the absolute size that matters. Similarly, while aimed fire exhibits square law behavior, area fire shows approximately linear behavior. When one side uses area and the other uses aimed fire, the model displays a mix of square and linear law behavior.

Letter to George Rykert (president of the Port Dalhousie and Thorold Railway), engineer from William Danforth, civil engineer

Letter to George Rykert (president of the Port Dalhousie and Thorold Railway), engineer from William Danforth, civil engineer in which he states that the preliminary survey has been made between Port Dalhousie and Centreville at which point it may intersect with the Great Western Railway. The estimate is included (2 pages, handwritten), July 25, 1853.

Letter to S.D. Woodruff from F. Lalor, assistant engineer

Letter to S.D. Woodruff from F. Lalor, assistant engineer. This is an estimate of work done by John Brown between Grantham and Thorold, Mar. 4, 1856.

Voucher #2 from the Engineer Department of Port Dalhousie and Thorold Railway Extension paid to Daniel Plumsteel, Dec. 31, 1856

Voucher #2 from the Engineer Department of Port Dalhousie and Thorold Railway Extension for surveys, paid to Daniel Plumsteel, Dec. 31, 1856.

Voucher #3 from the Engineer Department of Port Dalhousie and Thorold Railway Extension paid to Thomas Woods, Dec. 31, 1856

Voucher #3 from the Engineer Department of Port Dalhousie and Thorold Railway Extension for sinking test pits, paid to Thomas Woods, Dec. 31, 1856.

Pay roll voucher #4 from the Engineer Department of Port Dalhousie and Thorold Railway for the month of January, Jan. 1857

Pay roll voucher #4 from the Engineer Department of Port Dalhousie and Thorold Railway Extension for surveying for the month of January, Jan. 1857.