| Year | 1938 |
| Date | 28-Apr |
| Volume | 78 |
| Issue | 1,929 |
| Page | 395 |
| Category | Educational |
| Part | |
| Title | First Steps in Model Engineering. Workshop Advice, Experience and Philosophy for Readers of all Ages |
| Author | "Inchometer" |
| Notes | Mounting the old-time mortar, turning and boring the mortar, swivelling and recoil mounting for the Armstrong muzzle-loading gun, the trunnion bearing, elevation adjustment, method of sizing by limits, information from a workshop book, gauging and measuring, limits by measurement, limits by micrometer |