2o8 APPENDIX. 



" About the fame time experiments were made with a 

 " ftill of the common conftrudion, and Mr. Dove's in- 

 *' gredient. This method was attended with no advan- 

 *' tage over any that had been formerly ufed ; the dilHlled 

 ** water was moft unpalatable; and the enormous fize of 

 " the apparatus, which occupied a fpace of thirteen feet 

 " feven inches by fix feet one inch, and fix feet five inches 

 ** in height, rendered it impradicable on board fhips. 

 " An experiment was immediately afterwards made with 

 " the fame (till without any ingredient ; the refult, how- 

 " ever, was uniformly a moft unpalatable taite of the 

 " water. 



" About this period, alfo, M. Poiflbnnier of Paris intro- 

 " duced into the French marine a (till, three feet fix 

 " inches long, two feet wide, and eighteen inches deep. 

 A portion of the chimney pafTed through the upper 

 part of the ftill, much in the fame manner as that of 

 " Mr. HofTman : thefe gentlemen fuppofed that by this 

 " means they fhould fave fuel. The mouth of M. 

 *' Poiflbnnier's ftill was thirteen inches wide, on which he 

 " placed a tin plate, pierced like a cullender, with thirty- 

 " feven holes of fix lines diameter each ; to thefe were 

 *' fixed tin pipes, of the fame bore and feven inches long, 

 " terminating within the ftill-head. The intention of 

 " this contrivance is to prevent any of the water in the 

 " ftill from pafTing over into the worm, while the fhip 

 ^^ is in confiderable motion, 



A " In 





