120 



APPENDIX. 

 " them, by means of a fpiral copper thread, with a pipe 

 *' of an inch diameter at each end of the cafe ; the 

 " lower for receiving cold water, and the upper for 

 " carrying it off" when heated. 



" When only a very fmall portion of room can be 

 " conveniently allowed for diftillation, the machine 

 *' (N° 2. in the Plate), which is only twenty-feven inches 

 " long, may be fubftituted, as was done in this voyage. 

 ** The principal intention of this machine, however, is to 

 *' diftil rum and other liquors ; for which purpofe it has 

 " been employed with extraordinary fuccefs, in preventing 

 *' an empyreumay or^^r^/ tafte." 



Explanation of Plate XIV. 



** Figure i, reprefents in perfpe<5live a fedlion of the 

 *' two boilers taken out of the frame. In the back 

 " part at D, E, are feen openings for the cocks. On 

 " the top is a diftilling tube A, B, C, five inches dia- 

 " meter at A, and decreafing in fize to three inches at C; 

 *' the length from B to C is five feet. Near C is a ring 

 " to prevent the water which is applied to the furface 

 " from mixing with the diftilled water. In the infide of 

 *' the tube, below B, is a fmall lip or ledging, to hinder 

 *' the diftilled water from returning into the boiler by the 

 " rolling of the fhip. 



(c 



In 



