[ Ernst Engel, German statistician. ] Autograph Signature ('Dr. Engel') to manuscript letter, in German, to Frederick Martin, editor of the 'Statesman's Year-Book'.

Ernst Engel (1821-1896), German statistician and economist, commemorated by the Engel curve and the Engel's law
Publication details: 
Berlin, 27 July 1878. On letterhead of the 'Statistisches Bureau' of the Kingdom of Prussia.
SKU: 16763

2pp., 8vo. Heavily aged and creased, with slight damage to signature. 20 lines of text, neatly written out by a secretary. Concerning revisions to his entry in the volume. Scan supplied on request.