| Year | 1934 |
| Date | 23-Aug |
| Volume | 71 |
| Issue | 1,737 |
| Page | 191 |
| Category | Practical Letters from Our Readers |
| Part | |
| Title | Old-Time Paddle Engines, Small Air Pumps |
| Author | W.M. |
| Notes | Single piston rod steeple engine, steeple engine with four piston rods, section of Simpson-Strickland type air pump |