portions of the latter are finished off smooth, the top surface being brought to exact elevation and made perfectly level.

Fifth. See that all concrete is mixed according to the specifications, that it is put in place immediately after mixing, and that it is thoroughly rammed.

Sixth. See that no injury is done to the concrete in removing the timber forms, or, if any be done, that it be properly repaired; also, that the timber be left in whenever its removal would tend to injure the work.

Seventh. When concrete is placed under water, see that either a trémie or proper collapsing-bucket be used, and that the water be not permitted to injure the concrete. See also that all such concrete is mixed extra rich.

(H) PILING AND TRESTLEWORK.

First. See that all piles conform in size, quality, and straightness with the requirements of the specifications, even if they have been already passed by the timber inspector before shipment, and reject any that are unfit for use.

Second. See that all piles are driven straight and in proper position, and that the tops are not unduly injured in driving, having the said tops banded, whenever necessary to prevent splitting.

Third. See that all piles are cut off at the exact elevation required, and that the caps are properly drift-bolted thereto. On curves see that the superelevation is obtained properly, and not by shimming tip on the caps.

Fourth. See that all sway-bracing is bolted effectively to the piles and caps.

(I) TIMBER, FLOORING, AND HAND-RAILS.

First. Inspect all timber as soon as delivered, marking plainly all rejected pieces; and see that all such pieces are removed from the vicinity without delay, in order to prevent their being put into the structure without the knowledge of the resident engineer.  It  is,  of course,  permissible to use the