1851 Great Exhibition: Official Catalogue: Class IX.: John Barker
230. BARKER, JOHN, Dunnington, near York — Inventor and Manufacturer.
Iron wheel-plough and wood swing-plough.
Expanding parallel horse-hoe, with a Norwegian harrow attached, and two sets of coulters; made to expand and contract, so as to suit either curved or straight ridges.
Iron sliding horse-hoe, with shares; adapted for different soils; with wheels and Norwegian harrow attached.
One-horse Yorkshire cart, with a tipping apparatus; side-boards, as a manure cart; and a set of shelvings, for harvest work; the spring end door secures the shelvings.
Set of box whipple-trees, or two-horse draughts.
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