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The working drawings of John Smeaton, civil engineer. They illustrate his researches on waterwheels and applied mechanics, and the relative efficiency of overshot as opposed to undershot wheels. With supplementary engravings and manuscript notes.

Correspondence, papers, notebooks and specimens (copper and photographic) compiled by Sir Henry James.

The majority of this correspondence is based around the following themes: James's work for the Ordnance Survey (particularly the book of maps and photographs produced by the OS of Jerusalem), James's investigation of the corrosion by sea water of the copper bottoms of ships, letters discusing George Biddell Airy's proposed system of projection and personal letters of invitation to James.

The majority of the photographs relate to 'The Wreck of the RHONE', and in particular, of a survivor of the shipwreck, a cabin boy called John Bailey. (The RHONE was a steam packet ship, built in London in 1865. It sank off the coast of the Virgin Islands in October 1867, after being struck by strong winds. Of the 197 people on board only 24 survived. The wreck of the RHONE is now regarded as one of the world's most famous wreck dives).

The sketchbook consists mostly of sketches of trilobites drawn whilst James was in Ireland and the notebook contains notes on military topics.

Manuscript of the work 'Philosophical Experiments, containing Usefull and necessary Instructions for such as undertake long Voyages at Sea', by Stephen Hales, printed by and at the expense of the Royal Society in 1739.