Scientific Researches! - New Discoveries in Pneumaticks! - or, an Experimental Lecture on the Powers of Air 1802
Leaflet for a work entitled 'Cases of successful practice with Perkin's Patent Metallic Tractors'. 1801
Drawing. Design for hinged boards with pulleys for a driving band, 2 views and section of “Pulley frame No 1” that is shown fixed to one of the boards. Also 2 views and section of “No 2” that appears to have been intended to be fixed elsewhere. Endorsed in ink: “J. Watt / Apl. 5th 1810, 22 ¾" x 15 ¼", Coarse laid paper, no watermark. Drawing. Design for hinged boards with pulleys for a driving band 1810
Drawing. Black ink with dimensions ands titles in red ink. “Eidograph Jany 18th 1809 / Scale half inch to the inch / views of paralel motion” £ views of the wooden frames, trussed with “steel”, fitted up. The upper frame hangs vertically, with “roof” truss to rear, and the lower is horizontal with the truss upward. The support for the drilling instrument is show as “Tube or round bar …”. 21 ¾" x 17 3/8", watermark J WHATMAN / 1805. Drawing, dimensions and titles in red ink. “Eidograph Jany 18th 1809 /.... 1809