Record

StorageSite	UCL Special Collections
Level	Item
Reference Number	PEARSON/11/1/4/15
Title	Darwin, Sir Horace
Date	1888-1890
Date2	1893-1895
Date3	1898
Description	Letters to Pearson regarding designs for mathematical equipment, including: a machine for drawing equiangular spirals [sketch enclosed]; the design of a curve tracer [with enclosed diagrams and equations]; the Wheel of Life; bridge construction equipment [with enclosed diagram]; and requesting advice on calculating the stresses and strains in iron structures.
Extent	15 letters plus enclosures
AccessStatus	Open
AccessConditions	The papers are available subject to the usual conditions of access to Archives and Manuscripts material, after the completion of a Reader's Undertaking.

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