APPENDIX. 



205: 



Account of Do£tor Irving*s Method of obtaining frefli 

 Water from the Sea by Diftillation, 



A S the method of rendering fait water frefh, by 

 "^ diftillation, introduced by Dodlor Irving into the 

 Royal Navy in the year 1770, and pradlifed in this voyage^ 

 is an objeft of the highelt importance to all navigators, 

 and has not hitherto been generally known, I have added 

 the following very full account of its principles, apparatus, 

 and advantages, with which I was favoured by Dodor 

 Irving himfelf. 



" Previous to an account of this method of renderings 

 " fea water frefli by diftillation, it may not be improper 

 ** to give a (hort detail of the experiments which have 

 *^ been formerly made by others on this fubjedl ; pointing 

 " out at the fame time the feveral difadvantages attending 

 " their procefTes, and the general caufes which obftru6ted 

 ** the defired fuccefs. 



" Without entering into an account of the earlier expe- 

 " riments, it will be fufficient to take a view of fuch as 



have been profccuted with moft attention, for the 

 **■ laft forty years. 



*' The 



^6 



