Bulks affect? d by Friuli on. 174 
Exp. 5. A body was taken whole fiat furface was to its edge 
as 30 : 1 7 ; the flat fide was laid upon the horizontal plane, a 
moving force was applied, and the flage was fixed in order to 
flop the moving force, in confequence of which the body 
would then go on with the velocity acquired until the fridlion 
had deftroyed all its motion; when it appeared from a mean of 
12 trials that the body moved, after its acceleration ceafed, 
5.4 inches before it flopped. The edge was then applied, and the 
moving force defcended through the fame fpace, and it was 
found, from a mean of the fame number of trials, that the 
fpace defcribed was 74 inches before the body loft all its motion, 
after it ceafed to be accelerated. 
Exp. 6 . Another body was then taken whofe flat furface was 
to its edge as 60 : 19, and, by proceeding as before, on the flat 
furface it defcribed, at a mean of 1 2 trials, 54- inches, and on 
the edge 644 inches, before it flopped, after the acceleration 
ceafed. / 
Exp. 7. Another body was taken whofe flat furface was to 
its edge as 26 ; 3, and the fpaces defcribed on thefe two fur- 
faces, after the acceleration ended, were, at a mean of 10 
trials, 41 and 7JL. inches refpedlively. 
From all thefe different experiments it appears, that the 
fmallefl furface had always the leaf! fridlion, which agrees 
with the confequence deduced from the confideration that the 
friftion does not increafe in fo great a ratio as the weight ; we 
may therefore conclude, that the fridlion of a body does not con- 
tinue the fame when it has different furfaces applied to the plane on 
which it moves ^ but that the fmallefl furface will have the leaf 
f riel ion. 
7. Having thus eftablilhed, from the mofl decifive expert” 
ments 9 all that I propofed relative to fridlion, I think it proper, 
befon? 
