ao5 



APPENDIX. 



" The firft of thefe was the procefs of Mr. Appleby, 

 " publifhed by order of the Lords of the Admiralty, in the 

 " Gazette of June 22d, 1734. By the account of that 

 " procefs it appears, that Mr. Appleby mixed with the 

 " fea water to be diftilled, a confiderable quantity of the 

 " Lapis Infernalis and calcined bones. The highly un- 

 " palatable tafte of the water, however, exclufive of the 

 " extreme difficulty, if not impoffibility, of reducing the 

 " procefs into pradice, prevented the further profecution 

 *' of this method. 



" Another procefs for procuring frefli water at fea, 

 " was afterwards publiflied by Doctor Butler. Inftead of 

 " the Laph Jnfernalis and calcined bones, he propofed the 

 " ufe of foap leys; but though the ingredients were fome- 

 " what varied, the water was liable to the fame objedlions 

 " as in the preceding experiment. Dodor Stephen 

 " Hales ufed powdered chalk ; and introduced ventila- 

 " tion, by blowing fliowers of air up through the diltil- 

 " lino- water, by means of a double pair of bellows. It 

 '* was found by this method, that the quantity of frefh 

 •** water obtained in a given time, was fomewhat greater 

 ** than what had been procured by- the procefs of Mr. 

 *' Appleby. This invention, however, was fubjeft to 

 " feveral difadvantages. The air box which lay on the 

 " bottom of the ftill, as well as the chalk, much ob- 

 ^' flruded the adlion of the fire upon the water, at the 

 *' fame time that the boiling heat of the latter was 



** diminiflied 



