| Year | 1902 |
| Date | 01-Feb |
| Volume | 6 |
| Issue | 66 |
| Page | 58 |
| Category | Electrical |
| Part | |
| Title | A Sparking Dynamo for Gas Engine Service |
| Author | B.F.M.Weaver |
| Notes | Transverse section of field-magnet & pole pieces, end of commutator, armature disc, armature, shaft, commutator & pulley, complete machine |