Copy letter from Herbert Rix, to J Blaikie, The Bridge House, Newcastle, Staffordshire 'Dear Sir, In answer to your letter of the 20th inst. [instant], the paper you want is probably the following: - "The Recording Pyrometer; by Prof. Roberts Austen", in the Journal of the Iron and Steel Institute, 1893, No. 1, p.112. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 23 December 1895