of Perseverance Iron Works, Johnstone.
See John Weems
1864 Weems Drying, Cleaning and Cooling Grain, full report and Illustration of page 385 of The Engineer 1864/06/24.
1883 J. and W. Weems, Johnstone, Lead Pipe Making Machinery, report and Illustration, page 281 of The Engineer 1883/10/12.