| Year | 1951 |
| Date | 08-Nov |
| Volume | 105 |
| Issue | 2,633 |
| Page | 605 |
| Category | Lathe |
| Part | |
| Title | Screw-Cutting Multiple Threads |
| Author | E.G.Smith |
| Notes | New head for M.L.7 screwcutting indicator, the screwcutting indicator, multiple thread data, selecting lead and pitch, dividing with the indicator, illustrating variation of pitch angle with diameter, tools for multiple threads, setting tool |