I. A letter from Mr. David Martineau Surgeon in Norwich, to Sir Hans Slone, Bart. Coll. Med. Lond. Pr. S. R. V. Pr. concerning stones voided per anum.

These stones (Vid. Fig. 1, 2, 3, 4, 5.) were voided by a poor Woman, per Anum , on the 26, 27, and 28th of March last past, who was the pregnant about the 11, or 12th week according to Computation.