| Year | 1950 |
| Date | 18-May |
| Volume | 102 |
| Issue | 2,556 |
| Page | 703 |
| Category | In The Workshop |
| Part | 63 |
| Title | Compressed air Supply for the Workshop |
| Author | "Duplex" |
| Notes | The portable compressor unit, the compressor, lubrication of the compressor, cooling the compressor, machining the cylinder and hopper, the flywheel, air reservoirs, pressure gauges, the non-return valve, air hose, maintenance |