| Year | 1941 |
| Date | 13-Mar |
| Volume | 84 |
| Issue | 2,079 |
| Page | 217 |
| Category | Heat Engine |
| Part | |
| Title | An Experimental Heat Engine |
| Author | H.M.R. |
| Notes | Expansive properties of gases, vapours, etc.. View showing the indicator, power cylinder piston and connecting rod, view showing snifting-valve at bottom of tank, diagrams, plan and section, plan view |