Dearborn’s gold standard Balance. 45 
the points of suspension, depressed below the horizontal line. As 
the points vibrate in the arcs 7 s and ¢ u, the rising arm becomes the 
increasing lever, while it moves from gq to 0, and the falling arm in 
the same period, passing from fp to 7, is in more rapid progression 
losing its power. Fig. 8, which is the reverse of Fig. % demon- 
strates, that reversing the cause reverses the effect, as the falling arm 
is gaining power in the first instance, and the rising arm i in this; yet 
in both, the increase of power is proportioned to the increase of 
weight, therefore the more a beam i is loaded, the greater. is this ob« 
stacle to its turning, and with the oor: ed 
by its own flexion. ibs 
As no inflexible or nonelastic st substanc 
‘beams must ever have t to eheonter ey inconveniences, arising from 
the flexion of the bar, which I have termed a natural evil, as it can- 
not be avoided. It may be successfully counteracted in the construc- 
tion of a beam; but not by the method usually adopted, which is to 
ee eS ae ee ey susceptible of flexion, 
iitee wild wid beky ce fii Eee WW coo, 
of Sense Ihe power, necessary for turning it to any given angle 
on or ae Lage ie to the = of matter 
beam, whi a ly Gerd: en ci fac Ce 
Union Bank in Boston. The beam alone weighs nearly thirty 
pounds | avoirdupoise, ay appears sufficiently strong for bear 
without injury, at least ten times the quantity, for which it was 
ordered ; he ean hay ples ae ome fi althongit 
