Improved Method of working a Capstan. 4o\ 



tjiiired). The gas evolving from the retort presses on the surface 

 of the liquid in A, and causes it to ascend through the quill into C, 

 until the orifice of the tube being left open, it necessarily bubbles 

 through the liquid ; and what does not combine with it, passes 

 through the fluid in the bulb of the safety-funnel, D ; and raising 

 the Uquid into the upper cup, finally escapes. In the event of 

 a vacuum in the retort and lower receiver, it is obvious that the 

 air has free access through the communicating tubes of the safety- 

 funnel and quilled balloon. 



The impregnation is very soon effected, as the pressure is great, 

 and as the several parts are fitted by accurate grinding. Much 

 time is saved, and inconvenience, from the usual mode of luting 

 being: avoided. 



CIV. Improved Met/tod of workinsr a Capstan. By Lieut. 

 M. Shuldham, R. N. * 



Sir, — X I5EG leave to present to the Society a very simple con- 

 trivance of mine for applying, with much ease and dispatch, an 

 additional power to a capstan when required. The method has 

 been tried on board His Majesty's brig Cordelia, and was found 

 to answer. Many naval officers have also approved it, deeming 

 the contrivance a particularly useful one when applied to a ship's 

 cap^an. 



1 have the honour to be, sir, 



Your obedient humble servant, 

 No. 49, Great Titchfidd-strcct, MoLYNEAUX ShUI.DHAM. 



April 9, 1816. 



To C.Taylor, M.D. Sec. 



Copy of n Report nf Lieut. George Eyre Powell, First LieU' 

 tenant of' His Majesty's Brig Cordelia, relative to Lieut. 

 Shuldham's Method of applying more Men to the Capstan. 

 I have had an opportunity of trying your plan on the cap- 

 stan ; it answers in every respect as you stated. Indeed, it is 

 too great a purchase ; as, yesterday morning, against a stroog 

 gale and tide, I clapped on your swifter, and had the pleasure 

 to carry away a seven-and-a-half-inch messenger : got the mes- 

 senger removed to a fresh part, and carried it also away ; so you 

 may judge there was no foolish wind or tide. I was afterward** 

 obliged to have recourse to a runner and pendant. The mes- 



• Frnm tho Transactions of the Societi/ for t/ie E/icouraf.'enient of Art%, 

 Mani{factures and Cowmen t, forilieytiar laiC. — 'I'lie silver iiieital wus 

 voted for this coiiniiuiiicutiun, and a intidf:! of ilu- rMiiMuti is jjiesCi'vejl m 

 tiic Socicfv'b |■cI>o^i^^ll•v. 



r f 2 .seng<?r 



