| Year | 1924 |
| Date | 27-Mar |
| Volume | 50 |
| Issue | 1,196 |
| Page | 347 |
| Category | Workshop |
| Part | |
| Title | Grinding Screw Gauges |
| Author | Geo. C.Orpet |
| Notes | "Jones" screw gauge grinding machine, development of core and flank grinding, as seen through the microscope, diagram of measuring machine, diagram of cresting operation, lathe compensating device to correct leadscrew pitch errors, pitch diagram |