[Christian Friedrich Schönbein, German-Swiss chemist who discovered and named Ozone and invented the fuel cell.] Autograph Signature with Manuscript (Autograph?) address.

The signature - ‘Schonbein / June, 1842’ - is on a 4 x 1.5 cm slip of greyish paper, laid down over the bottom left-hand corner of a 10 x 6 cm piece of the same, carrying the address ‘To the President of the Chemical Section of the [British] Association / Manchester’. The slip with the address is in its turn laid down on a piece of paper cut from a leaf of an autograph album. There is some difference between the handwriting of the signature, which is looser, and the address, which is more formal; and whether hte latter is also by Schönbein is unclear. An uncommon signature, but not in the best of condition, worm and spotted, with damage to one word ('British'). See Image.