472 KANSAS CITY REVIEW OF SCIENCE, 
ture rises fifty feet above the piers. It is a Pratt or Whipple truss structure with 
inclined end posts, the web being arranged with double intersections. 
Each span has sixteen panels of twenty-five feet each. 
The ties are in two lengths and couple on pins passing through centers of 
the posts. Attached to these pins a strut extends between each pair of posts, 
and a system of diagonal wind bracing connects these struts with the top lateral 
struts. 
The middle of each inclined end post is supported by a horizontal lattice 
work strut, which reaches to the first vertical post. 
The floor beams are riveted to the posts immediately above the bottom chords, 
and act as lateral struts, the lateral ties being coupled on pins passing through 
jawnuts screwed on ends of the lower chord pins. 
The stringers are riveted to the webs of the floor beams. 
From pier No. 1 we pass to pier No. 2. This pier is midway over the 
river, four hundred feet from pier No. one, on the west bank, and the same from 
No. three, on the east. This pier is based on rock thirty-twoand a half feet below 
low water, by sinking a pneumatic caisson, twenty-one by fifty-one feet, through 
fifteen feet of sand. This is surmounted by a timber crib-work filled with beton. 
The masonry was begun at two feet below low water. Like numbers 1 and 3, 
this pier rises sixty-two feet above low water to the railroad bank. 
Another four hundred feet and we reach pier No. 3, on the east bank of 
the river. This pier is based on rock fifty-two feet below low water, and was 
built in a pneumatic caisson, the same as No. 2. The masonry was begun six 
feet below low water. At this point the entire height, from the base of the pier 
up to the top of the bridge, is one hundred and sixty-four feet. 
These piers, one, two and three, have all the same general form, their 
several tops the same sixty-two feet above low water. Under the coping courses 
they measure eight by thirty-three feet, the ends being circles of four feet radius. 
They are built with a batter, or slope, of one-half inch to the foot on sides and 
ends. At thirty-four feet below the coping courses, the ends are changed to a 
pointed form, the lines being arcs of circles, struck from points seven feet apart. 
At the foot of the battered work the piers are thirteen by forty-four feet. 
They are of first class rock-faced masonry, laid in Portland cement and 
backed with béton. We now leave the channel of the river and pass on over 
the three deck spans, of two hundred feet each. At two hundred feet from pier 
No. 3. we reach pier No. 4., which is based on rock fifty-four feet below low wa- 
ter and built as two and three, in a caisson eighteen by forty feet, through sixty- 
five feet of sand. The masonry of No. 4 begins at one foot above low water, on 
the top of fifty-five feet of béton. 
Pier No. 5 rests on seventy-eight piles driven inside of a curb eighteen by 
forty feet to an average depth of thirty feet below low water. These piles are 
capped by a grillage, and bedded inside the curb in béton; the masonry begins 
at low water. 
