Letter from [Henry James] Chaney, Standards Department, Board of Trade, to the Secetary of the Royal Society Enquires whether the expansion apparatus shown on page 541 of volume 32 of the Proceedings of the Royal Society (1881) and page 282 of volume 30 (1876), and used by G F Rodwell, would be 'available to for use' by the Standards Department to determine the 'rate of expansion of' metals. 20 February 1888