Mechanical substitute for the arms, United Kingdom, 1919.

Metal cup adapted for use with a mechanical substitute for the arms, United Kingdom, 1919

Spoon adapted for use with a mechanical substitute for the arms, United Kingdom, 1919.

Road steamer 'Derwent', c 1868..

Concorde prototype stationary on a runway.

BT prototype portable office.

Aitken's pocket dust counter, 1890.

View of Edinburgh, Scotland, mid 19th century.

London & Edinburgh Shipping Company poster, early 20th century.

Dredger in dry dock for damage inspection, Leith, Scotland, c 1863.

Dredger by Junction Bridge, Leith, Scotland, c 1863.

Drainage canal dredger, 'Carmen', Mexico, c 1892-1919.