| Year | 1930 |
| Date | 03-Jul |
| Volume | 63 |
| Issue | 1,521 |
| Page | 10 |
| Category | Electrical |
| Part | 2 |
| Title | Electric Motor Installation and Management |
| Author | A.H.Avery |
| Notes | Open, totally enclosed and open protected type frames, pipe ventilated and flame proof type frames, sections of alternating and direct current motors, armature & ventilating fan, four-pole field magnet, stator of A.C. induction motor, squirrel-cage rotor |