Gazeteer of Mines in Chili (Chile)
Marshall's Geological Diagrams
Manuscript entitled: "Catalogue of the Apparatus of Philosophical Instruments, in the Collection of Her Late Majesty Queen Charlotte, at the Observatory at Richmond in Surrey"
Drawing entitled 'Sectional Drawing for a Steel Protected Cruiser for Colonial Defence to be named'
Part of the end view of the Difference Engine
Locking motions for carriage column.
Untitled pencil layout, includes mill racks.
Untitled. [Drawings of cams]
Temporary staging
Untitled. [Operations for the Analytical Engine]
Notation of the Analytical Engine
Pages 134 and 135 of Jeremiah Head's diary
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