C 317 ] 
7. In the account of Mr. Appleby^s procc’fs, for 
making fea- water frefh> which is publiflied by order 
of the lords of the admiralty, in the Gazette of 
Jan. 2 2, 1 7 54, it is faid, that a ftill, which contains 
20 gallons of water, will diftil 60 gallons in ten’ 
hours, with little more than one bufhcl of coals ; 
and therefore 120 gallons in 20 hours, with little 
more than two bulhels of coals; , And by ventila- 
tion 240 gallons, or a tun > and 34 gallons may be 
di Hilled in twenty hours, making an allowance for 
the times of heating thofe Hills full of cold water j 
and a Hill fomething larger and wider will diftil 
a tun in 24 hours j which will more than fuffice for 
a lixty gun Ihip, with 400 men, whofe provjfion of 
water for four months is about 110 Tuns. And' 
larger fhips may either have proportionably larger 
Hills, or elfe two of them. As for merchant-Hiips 
with few men, a fmall Hill will be fuflicient. 
8. TheTecond-fized Hills contain 10 gallons, and 
will produce 60 gallons in 20 hours, with half the 
above-mentioned fuel j and by ventilation 120 gal-- 
lons. 
5>. The leaH Hills contain five gallons, and will! 
produce 32 gallons in 20 hours; and by ventilation* 
64 gallons in 20 hours. 
10. I have feen fome of thefe Hills at MefiTrs. Steel’ 
ai'Ki Stephens’s, o ver-againH Mercers-chapel, in Gheap- 
fide, which have been made for this purpofe.- There 
are holes in the feet of the iron frame or Hove, to’ 
ferew them down to the deck. They were fixed^at 
tlie fore-caHle before the maH, in Ring Charles the’ 
fecond’s time, when they thought they had difeo- 
vered the way to diHil fea- water, free from the noxi-- 
OUS" 
