| Year | 1937 |
| Date | 16-Dec |
| Volume | 77 |
| Issue | 1,910 |
| Page | 593 |
| Category | Metal-Craft in the School Workshop |
| Part | |
| Title | Files and Filing |
| Author | Nathan Sharpe |
| Notes | Cross section of file teeth, the teeth of files, front view of double cut teeth, hand cut files, angle of single- and double-cut teeth, hand cut versus machine cut teeth, grades of cuts, do files cut or only scrape? |