| Year | 1934 |
| Date | 02-Aug |
| Volume | 71 |
| Issue | 1,734 |
| Page | 105 |
| Category | Workshop |
| Part | |
| Title | Designing Small Air Compressors |
| Author | Edgar T.Westbury |
| Notes | Diagrams illustrating the meaning of discharge efficiency, a photo of small compressor, practical examples, a compressor suitable for intermittent working, a machine of 2 1/2 cu. in. displacement |