| Year | 1939 |
| Date | 13-Apr |
| Volume | 80 |
| Issue | 1,979 |
| Page | 432 |
| Category | Stationary Engine |
| Part | |
| Title | A Mill Engine |
| Author | A.R.Horsley |
| Notes | Construction of a 3/4" scale model of a 400 h.p. Tandem Compound Engine with Corliss Trip Gear. Showing crank and connecting-rod, close-up view of L.P. cylinder showing trip gear and hand variation control, close-up view of Corliss gear |