U5 r 
But if after the {hutting up the above-mention’d 
Holes, another Hole be opened, communicating with 
any other Room or airy Place, and with the Fire 5 it 
is clear, the faid Fire muft again be raifed and bum 
as before; there being a like Draught of Air through 
the fame, as there was before the flopping up of the 
firft Holes : This Cafe differing only from the former 
in this, that the Air feeding the Fire will now be 
fupplied from another Place. 
It is therefore propofed, that in order to clear the 
Holds of Ships of the bad Air therein contained, the 
two Holes above-mentioned, that is, the Fire-place 
and Afh-place, be both clofed up with fubflantial and 
tight iron Doors; and that a copper or leaden Pipe, of 
fufficient Size, be laid from the Hold into the Afh- 
place, for the Draught of Air to come in that way 
to feed the Fire. And thus it feems plain from what 
has been already faid, that there will be from the 
Hold a conftant Difcharge of the Air therein con- 
tained ; and confequently, that that Air fo difeharged 
muft be as conftantly fupplied by frefh Air down the 
Hatches, or fuch other Communications as are open 
into the Hold ; whereby the fame muft be continu- 
ally frefhen’d, and its Air render’d more wholfome, 
and fit for Refpiration. 
And if into this principal Pipe fo laid into the 
Hold, other Pipes are let in, communicating refped- 
ively either with the Well or lower Decks, it muft 
follow, that Part of the Air confumed in feeding the 
Fire, muft be refpedively drawn out of all fuch Places, 
to which the Communication (hall be fo made. 
XIII. A 
