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MACHINE TO PREVENT OROWNINOo 



procure the various prices of your invention, anxious to 

 recommend it in even sailing; excursiona, in which its 

 utility has been so evidently demonstrated, and its use 

 ascertained. 



You are at liberty. Sir, to it^ake whatever use you please 

 of this account, and J beg to subscribe myself. 



Sir, 

 Your most obedient humble servant, 



JOHN DICKENSON. 



Swayi with Tioo Necks, Lad Lane, 

 Jan. 30, I8Q7. 



Reference to the figure of Mr. DanieVs Machine, called a 

 Life Preserver when Shipwrecked, PI. VIII, Fig. 1. 



The machine ■^' represents the body of the machine, which is doublts 

 described. throughout, made of pliable water-proof leather, large 

 enough to admit its encircling the body of the wearer, 

 whose head is to pass betwixt the two fixed straps, BB, 

 which i*est upon the shoulders; the arms of the wearer 

 pass through the spaces on the outside of the stiraps ; one 

 ©n each side, admitting the machine under them to encircle 

 the body like a large hollow belt; the strap, C, on the 

 lower part of the machine, is attached to the back of it, 

 and by passing betwixt the thighs of the wearer, and buck- 

 ling at D, holds the machine sufficiently firm to the body, 

 without too much pressure under the arms. The machine, 

 being thus fixed, is inflated with air by the wearer blowing 

 in from bis lungs, through the cockE, a sufficient quantity 

 of air to fill the machine, which air is retained by turning 

 the stop-cock. The machine, when filled with air, will dis- 

 place a sufficient quantity of water, to prevent four persons 

 from sinking. 

 Method of Mr. Daniel recommends his life presei-vers to be prepared 



niukiDgit. as follows: viz. To select sound German horse-hides, and 

 to cut a piece six feet lo.ig, and two feet six inches wide, 

 free from blemish or shell ; it is first to be curried, and then 

 rendered water-proof by Mollerstein's patent varnish, of Os- 



born 



