| Year | 1918 |
| Date | 08-Aug |
| Volume | 39 |
| Issue | 902 |
| Page | 72 |
| Category | Horology |
| Part | |
| Title | Electrical Horology |
| Author | H.R.Langman |
| Notes | Introductory, historical, Bain's electric clock, secondary clock, Lemoine's electric clock, the "Bob" type of electric pendulum, two classes of electric clocks, general theory of electric clocks, Wheatstone's clock, Brequet's electric clock, the "break" arrangement, Shepherd's electric clock, Jones's electric clock, an early form of electric turret or church clock |