| Year | 1916 |
| Date | 27-Jul |
| Volume | 35 |
| Issue | 796 |
| Page | 58 |
| Category | Workshop |
| Part | |
| Title | An Efficient Air Compressor |
| Author | G.Gentry |
| Notes | Converted from a Small Steam Engine by L.M.G.Ferreira. Sections of air compressor cylinder showing water jacket, suggested air-tight piston, outline of edge of jacket tube |