| Year | 1919 |
| Date | 27-Mar |
| Volume | 40 |
| Issue | 935 |
| Page | 210 |
| Category | General |
| Part | 1 |
| Title | The War Work of Bassett-Lowke, Limited |
| Author | |
| Notes | The Making of Screw Gauges. A group of special screwcutting lathes at work, the Mackenzie screw gauge lapping machine, testing the thread diameter of screw gauges, apparatus for the optical projection of screw threads, enlarged shadow of a screw gauge, measuring the effective thread diameter by needle bars, a nearer view of thread diameter testing, testing a screw gauge for accuracy of pitch |