| Year | 1920 |
| Date | 14-Oct |
| Volume | 43 |
| Issue | 1,016 |
| Page | 305 |
| Category | General |
| Part | |
| Title | A Visit to the National Physical Laboratory |
| Author | |
| Notes | Diagram of arrangement of a thermo-couple, Lorentz apparatus for measuring E.M.F., apparatus for determining the unit of current, Pitot tube for measuring air speeds of aeroplanes, Chattock micro-manometer |