and clean lines, angles, and mouldings, all re-entrant angles being properly filleted.

CAST STEEL.

All steel castings shall be made of acid open-hearth steel containing from twenty-five hundredths (0.25) to four tenths (0.4) per cent of carbon, and not more than the following percentages of other ingredients:

Phosphorus, five hundredths (0.05).
Sulphur, five hundredths (0.05).
Manganese, eight tenths (0.8).

The ultimate tensile strength shall run from sixty-five thousand (65,000) to seventy-five thousand (75,000) pounds per square inch; the elastic limit shall not be less than one half (1/2) of the ultimate strength; and the elongation of test specimens in two (2) inches shall not be less than fifteen (15) per cent for fixed castings or seventeen (17) per cent for movable castings.

All steel castings shall be carefully and uniformly annealed, and shall be true to drawings, smooth, clean, and free from blowholes, sponginess, and all other defects. All corners therein shall be properly filleted.

TESTS OF ROLLERS FOR DRAW-SPANS.

The Contractor shall make, at his own expense, under the direction of the Engineer or his duly authorized representative, for each draw-span, tests, not exceeding three (3) in number, of full-sized cast rollers; also any tests of specimens of the metal for the same that may be considered necessary by the Engineer to determine its quality.

OTHER TESTS OF FULL-SIZE MEMBERS OR DETAILS.

The Contractor shall make, at his own expense, under the direction of the Engineer or his Inspector, such other tests of full-size  members  or  details as the Engineer  may prescribe,