rolled shall be within the following limits:

=================+============================+============================
| BESSEMER. | OPEN-HEARTH.
+-------------+--------------+-------------+--------------
|70 lbs. and | |70 lbs. and |
| over, but |85 to 100 lbs.| over, but |85 to 100 lbs.
|under 85 lbs.| inclusive. |under 85 lbs.| inclusive.
-----------------+-------------+--------------+-------------+--------------
Carbon |0.40 to 0.50 |0.45 to 0.55 |0.53 to 0.66 |0.63 to 0.76
Manganese |0.80 to 1.10 |0.80 to 1.10 |0.70 to 1.00 |0.70 to 1.00
Silicon |0.07 to 0.20 |0.07 to 0.20 |0.07 to 0.20 |0.07 to 0.20
Phosphorus, | | | |
not to exceed | 0.10 | 0.10 | 0.04 | 0.04
Sulphur, | | | |
not to exceed | 0.075| 0.075 | 0.06 | 0.06
=================+=============+==============+=============+==============

"3. When the average phosphorus content of the ingot metal used in
the Bessemer Process at any mill is below 0.08 and in the
Open-Hearth Process is below 0.03, the carbon shall be increased at
the rate of 0.035 for each 0.01 that the phosphorus content of the
ingot metal used averages below 0.08 for Bessemer steel, or 0.03 for
Open-Hearth steel.

"The percentage of carbon in an entire order of rails shall average
as high as the mean percentage between the upper and lower limits.

[Sidenote: Shearing.]