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likewise was tried on board the Hulk , with an iron 
Tube about Two Inches and an half in Diameter, and 
the lighted Candles held at the Bottom of this Tube 
were extinguished as faft as by any of the other. 
It may be objected, that a Number of Tubes take 
up too much Room, efpecially in Merchants Ships, 
and are fubjeft to be broken or injured by loading or 
unloading : To remedy which, it is advifcable, that 
only one Tube of a convenient Size be made faft 
unto the Side of the Afh-pit, and, as foon as it comes 
through the main Deck, to comprefs it (a circular or 
any other Form being equally ufeful) not too clofe ; 
and it may be divided into as many Ramifications as 
may be thought neceflary, (efpecially as the Bread- 
room, Store-room, &c. cannot be kept too fweet, 
a Branch for each of thefc) and thefe Branches be 
carried between the Beams which fupport the Deck, 
till they come to the Side of the Ship, and there 
let down likewife between the Beams into the Places 
intended $ by which Contrivance their Operation 
will not in the leaft be obftru&ed, and the Tubes be 
fecured from any Accident. 
The Simplicity of this Machine, it being fo little 
cumberfome, its Operation without any Labour to 
the Seamen, the fmall Expence to put it in Execu- 
tion, and maintain it, befides the before-mentioned 
Confiderations, are other Arguments for its general 
Ufe. 
V. Tart 
