[ .54 2 1 
engine with water, was by fome accident Hopped ; 
and the water in the boiler was fo exhaufted, that 
the crown of the boiler, (or the middle part of the 
iron bottom, which is mod elevated) became quite 
dry, and was heated red hot- And altho’ there 
was only fo fmall a quantity of water remaining in 
the boiler, the engine ceafed not to work ; but, on 
the contrary, was obferved to move with unufual 
b: ificnefs ; until at length, the Hrongly heated, and 
extremely ratified Hearn melted the pcw.er, where- 
with the joints of the top of the boiler (which was of 
copper) were foldered, and burd through them with 
great impetuofity. 
Conclufion from the foregoing Experiments and 
Objervations. 
The foregoing experiments feem to prove, that 
the Hearn of water is capable of being heated and ra- 
rified to a much greater degree than the Hearn is 
heated, which is now applied in the fire-engine ; and 
that the expanfive force of Hearn is greatly increafed 
by heat, and confequently, that a much fmaller quan- 
tity of Hearn, mod Hrongly heated and ratified, will 
work an engine, than is now applied of cooler Hearn. 
Which fmaller quantity of Hearn may be railed in 
fmaller vefieb, and with fmaller fires, than are now 
ufed in working thofe engines. 
Tract ice. 
The Hearn of water may probably be heated and 
ratified to a very great degree, for the ufe of the fire- 
engine, by the following method. 
To 
