Copy letter from Herbert Rix, to T Ewan, care of Professor Van't Hoff, Chemical Laboratory, Roeter's Straat, Amsterdam 'Dear Sir, I am instructed by the Secretaries to ask you whether all the drawings in your paper are necessary, and in particular whether the inclosed photograph may not be omitted. We are obliged to reduce the expenditure upon illustrations as much as possible. I am, yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 13 July 1894