A way to reduce concussions produced by rowing screws of steam vessels

A way to reduce concussions produced by rowing screws of steam vessels: No. 19267. Supponent.10/17/1908.Issuance 06/22/1911 / h.A.Parsons.- [B.M .: B. and., 1911].-[2] p., 1 l.Il .. -Description of the method of reducing concussions produced by rowing screws of steam vessels.To the privilege of a foreigner Ch.A.Parsons (Ch. A. Parsons), in the city of New Cestle, on a secret, in England, declared on October 17, 1908 (okhr. St. No. 37281).Group III.No. 19267. The privilege issued on June 22, 1911..I. Parsons, h.a..1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS