%0 Journal Article
%T Description of a Spring-Block, Designed to Assist a Vessel in Sailing
%J Transactions of the American Philosophical Society
%D 1793
%A Hopkinson, Francis
%V 3
%N 
%P 331-331
%X <p>[Abstract unavailable]</p>
%G 
%I American Philosophical Society
%@ 0065-9746
%U http://dx.doi.org/10.2307/1004885