| Year | 1930 |
| Date | 17-Jul |
| Volume | 63 |
| Issue | 1,523 |
| Page | 53 |
| Category | Electrical |
| Part | 3 |
| Title | Electric Motor Installation and Management |
| Author | A.H.Avery |
| Notes | Side and end sectional views of a direct current motor (Crompton Parkinson), motor with pad lubricated bearings (Wolf & Morgan), self-oiling bearing with ring lubrication, with double rings (Verity) |