| Year | 1955 |
| Date | 21-Jul |
| Volume | 113 |
| Issue | 2,826 |
| Page | 74 |
| Category | Pump |
| Part | |
| Title | Rotary Pumps and Motors. Positive Displacement Pumps - Variants of the Gearwheel Pump |
| Author | "Artificer" |
| Notes | Varley Mode I.G.301 rotary pump, the Northey compressor, Jobson & Beckwith "Rotan" pump, Keelavite rotary abutment pumps, capacity adjustment, hydraulic torque convertors, special applications, hydraulic clutch limitations |