| Year | 1922 |
| Date | 10-Aug |
| Volume | 47 |
| Issue | 1,111 |
| Page | 125 |
| Category | Testing |
| Part | 8 |
| Title | Precision. Testing and Measuring Screw Threads |
| Author | |
| Notes | Special micrometer stand for interrupted threads, dead centre support for testing depth of threads, measurement of "effective diameters" by means of wires, microscope, projecting lamp and lens, screen with adjustments, micrometer screw gauge |