ircittsattions Society Naval Architects and Marine Engineers, Vol. 21, iQij. 



To illustrate patter on "The E't'olution of the Lightship," 

 by George Cro use Cook, Esq. 



Plate T(5. 



2i' Halt round '^H' 

 G. OUT. 



Sheer STRAKF 4^' '2J*F0«zL AHID . 

 toitV AT ENna 



D.R.BUTTSTWAPa •mwOCJS HOU 



WfM W AMID.rat2t*AT ENDS . 

 D.R. BUTTSTRAPS THUQUGHI 



SARBQARD STRAKE .^le'TOn tl.AHIO. 

 T6|5*A Xt; 



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