J. Gilbert and Co
of Boston Street, Hackney Road, London
1848 Short description of Gilbert's double cylinder steam engine [1]. It was a beam engine of the 'vibrating pillar kind' (grasshopper?), with the low pressure cylinder in line with the HP cylinder, but beneath the bedplate, i.e. a tandem compound engine. A 12 HP engine was working 12 hours a day driving sawing machinery, the boiler fuel being sawdust.
1850 'STEAM ENGINES. GILBERT’S DOUBLE CYLINDER is the simplest, cheapest, and most economical ever devised.
Parties requiring Steam Engines should apply for particulars to J. Gilbert and Co., Engine Works, Boston-street, Hackney-road, London.
PS. Several High-pressure Engines and Boilers, from 2 to 20-horse-power, to be disposed of.' [2]