PHYSICAL anv LITERARY. 261 
it is, that metals, as they are the heavieft 
bodies, fo they reach the greateft degree 
of heat. ‘The fame holds in fewel; the 
hardeft woods are made choice of, when 
a ftrong heat is wanted ; and, even in 
common peats, I have fhewn you how far 
preferable the hard and folid are to the 
light and fpungy. By fome experiments 
which I have made, I find it to be no 
difficult matter to bring peat to a confi- 
derable degree of folidity, as you your- 
felves may fee by the fpecimen I now 
fhow you. The fimple operation of grind- 
ing, does the bufinels ; ;and as a peat, when 
taken out of the mofs, is a foft body, 
and eafily grinded, a machine may be 
eafily contrived to grind, at a moderate 
expence, feveral tuns in a day. The 
charge of digging peats, cutting them 
into {quares or the form of bricks, when 
of a proper drynefs, will be little different 
from that of making peats in the : ar) 
i. dinary way- The folidity of peat pre- 
pared in the manner mentioned is fur- 
prifing ; its fpecific gravity being fome- 
what greater than that of pit-coal. I 
compared 
