| Year | 1921 |
| Date | 20-Jan |
| Volume | 44 |
| Issue | 1,030 |
| Page | 47 |
| Category | Nautical |
| Part | |
| Title | The Outboard Marine Petrol Motor |
| Author | W.S.Farren |
| Notes | Bevel gear box and water pump, loads on the bearings and gears, gear ration, an example of alteration to the gear box to cure these defects, gears, shafts, bearings, thrust bearing - vertical shaft, main thrust bearing, description of the Michell bearing |