ON THE BODIES TERMED SIMPLE. |^t) 



barrel cask ; and it is of a nature so analogous to that kind 

 of machinery, to which sailors are accustomed, that it can 

 be readily understood and managed by them. 



In order to render the description of my double capstan 

 more clear, I annex a sketch of it, as iitted up in the man- 

 ner proposed. 



T am, Sir, 

 Your very respectful humble servant, 



J. WITLEY BOSWELL. 



Reference to the Engraving of Mr. BostveWs improved 

 Capstan, to prevent the necessity of surging. Plate 4, 

 Fig. 5. 



A Represents the larger or common capstan vised on board Explanation <rf 



„i • the plate. 



ships. ^ 



B Another capstan of less din:iensions, placed in a similar 

 manner. 



C The coils of the messenger passing alternately round 

 the large and small capstans, but with their direction re- 

 versed on the different barrels, so that they may cross each 

 other in the interval between them. 



D D D D Projecting rings round each capstan or barrel, 

 so fixed on the two barrels, that those on one barrel should 

 be exactly opposite the middle of the intervals between 

 those on the other barrel. 



X. 



Letter from Dr. Beddoes on certain Points of History, re- 

 lative to the Component Parts of the Alkalis, with observa- 

 tions relating to the Composition of the Bodies termed 

 Simple. 



To Mr. NICHOLSON, 

 Dear Sir, 



JL Never regarded the base of the alkalis as belonging to Alkalis not 

 the metallic order of combustibles, or projected their re- ^'^^^^^^^ Jj 



duction 



