New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1895-07-14

o,. ,,, . single arch and prepared for H. and
ia was on the way to a discovery that has revo-
,u,ionized bridge engineering the discovery OF ,ne
o.,,uever system OF construction. His bridge
over the Hudson River would have consisted OF
.,r,,o snan. n would have been erected without
falsework 10 support the superstructure pehdihs
junction at the central point or the arc "o'N
would have been carried on simultaneously ito"
both abutments. and the cost or br'dse WIN
.r.n NJ 100 feet no had calculated TO reach the
modest sum OF $4,000. OF course the material was
% he mainly timber deliberately framed and knit
.oo,her hut strengthened with iron chain bands
for the angular or subsidiary levers and with chah
n,.,e. screws bolts and nuts for frmer adhesion
OF the numerous parts
THE EXPENSE SOON TO BE MET.
| Tho description In detail OF the Inventor II most
elaborate and II Is difficult TO make clear the
method without the working diagram Drawn 10
definite scale with which he has enriched the pages
NJ the work The illustration OF the finished
structure in all It's amplitude OF proportion -
satisfying TO the eye. from the magnificent spring
~ the nyng arc the graceful scroll on the inner
| bend of the buttresses wherein were bedded the
sustaining ends OF the great levers which, quad
| rapgular H. form and vanishing to point toward
| the centre formed in the space between them
nar,ec, isosceles triangle. The bridge when fin
sbed was to provide double carrageways and
! walks for foot passengers. At the water base OF
the buttresses there were to be piers for the land
ing OF goods and within the buttresses themselves
extensive warehouses for the storage OF valuable
| fre,gbt The revenue from these the inventor
deemed would be sufficient speedily to repay the
| cost OF the entire structure.
The inventors definition OF his idea az n flying
nendent lever bridge Is sufficiently explicit He
| defines Il I'm the scholium which follows:
Fr,rst-Because the arms OF this bridge spring
from the abutment on each side. and extend over
a river or space, till they meet In the centre. and
form one single arc without centres. or support OF
| any kind while building. save the abutments from
which they spring.
secondly-They fly out and are suspended In the
air
Thirdly-They hang or jut over.
Fourthly-They are supported above the ground
The principle giving rise to the invention was
the lever In its simplest FORM but elaborated under
| treatment to a gigantic extent Cut the accom-
panying illustration In two at the centre OF the
arc This done, each half Of the bridge Is to be
considered as one body. Then the fuicrum. II II
were Intended TO move. would be between the
weight, which L. the abutment. and the power
| which IL the projecting arm Of the haif-bridse
BY this Pope meant that the fulorim on which the
| weight and power would spring In case OF an up
heaval would be the innermost point or toe OF MS
abutment Necessarily he had therefore carried
resistance to displacement of this part OF MS
problem 10 a climax OF effectiveness. But he had
gone further than this simple lever for. by the
form OF his projecting arms and the manner OF
their construction. the space between the upper ana