| Year | 1916 |
| Date | 20-Apr |
| Volume | 34 |
| Issue | 782 |
| Page | 273 |
| Category | Workshop |
| Part | 10 |
| Title | How Machine Tools Work |
| Author | Fred Horner |
| Notes | The Equipment of Drilling Machines. Standard forms of drills, standard angles, effect of lip clearance on point, the action of drills, angles of twist drills, thinning the point, various results of incorrect grinding, faults in grinding |