THE KANSAS CITY BRIDGE. 95

Three triangular beton boxes.

Two square beton boxes.

Two steam crabs, one single and one double.

Six land crabs.

To these should be added the belts, pulleys, and shafting used in driving
the machinery at the several piers, the long suspension screws referred to in the
chapter on Foundations, with nuts and wrenches ; the gas-pipe and flexible
hose, used for both steam and water ; sand-pans and water-kettles used in
mixing mortar in cold weather ; two or three small portable forges; a good
supply of blocks and lines, and the proper complement of smaller tools, which
it is needless to mention. A tremmie was constructed for laying beton under
water, but never used, The more important tools which were designed origi-
nally for this work, have been described in the preceding pages.