The Zoomifyer viewer uses Flash 6. You can download Flash here. The viewer is optimized for 1024 x 768 screen resolution and is controlled via the keyboard or the controls at the bottom of the image:
Keyboard Controls : Zoom In = AZoom Out = ZMove = Arrow Keys
Mouse Controls : Zoom In = Zoom Out = Zoom Slider = Click and drag Move = Arrow Symbols or click and drag mapReset Map =
Alternatively you can click here to see the image without the viewer at the largest size possible for your monitor.
Source: Land Department, Alberta Railway and Coal Company, 1890; A. Johnson, and A. den Otter, Lethbridge: A Centennial History (Lethbridge: Lethbridge and the Whoop-Up Country Chapter, Historical Society of Alberta, 1985).