| Year | 1916 |
| Date | 13-Jul |
| Volume | 35 |
| Issue | 794 |
| Page | 17 |
| Category | Workshop |
| Part | |
| Title | An Efficient Air Compressor |
| Author | G.Gentry |
| Notes | Converted from a Small Steam Engine by L.M.G.Ferreira. Plan view, general view of air compressor adapted from a small steam engine, details of valves & seatings |