======================+=======+===============================
| Ratio | Capacity
Pump Sizes. | of | At 100 lbs.
| Piston| at Pump.
------+-------+-------+ Areas.+----------+--------+-----------
Steam.| Water.|Stroke.| | Number of| Nominal| Actual
| | | | 1-1/8 in.| Gals. | Gals. Per
| | | | Streams. | Per |Min. as per
| | | About | | Minute.| Art. 4.
------+-------+-------+-------+----------+--------+-----------
14 × 7 × 12 |4 to 1 | =Two= | =500= | 4830
14 × 7-1/4 × 12 | | | | 520
----------------------+-------+----------+--------+-----------
16 × 9 × 12 |3 to 1 | =Three= | =750= | 8060
----------------------+-------+----------+--------+-----------
18 × 20 × 12 |3 to 1 | =Four= | =1000= | 9990
18-1/2 × 10-1/4 × 12 | | | | 1050
----------------------+-------+----------+--------+-----------
20 × 12 × 16 | 2-3/4 | =Six= | =1500= | 1655
| to 1 | | |
----------------------+-------+----------+--------+-----------