| Year | 1938 |
| Date | 30-Jun |
| Volume | 78 |
| Issue | 1,938 |
| Page | 619 |
| Category | Workshop |
| Part | |
| Title | A Small Dental-Type Drill |
| Author | I.S.Bergius |
| Notes | General view showing belt-tension adjustment and guide pulley arrangement, construction, hand piece mounting, gymbal-arms, "elbow" mounting, upper guide-pulley mounting |