| Year | 1919 |
| Date | 18-Dec |
| Volume | 41 |
| Issue | 973 |
| Page | 554 |
| Category | Electrical |
| Part | |
| Title | Electric Tools |
| Author | "Calculus" |
| Notes | Sectional view showing details of construction of an electrically driven drill, a heavy duty drill with feed-screw attachment, an electric breast drill in operation, a light electric drill for drilling on overhead positions, toolpost grinder, an electric hammer set up for operation in a lathe, a "Wolf" electric bench grinder, using a portable electric polisjing buff, a portable electric circular saw in use, details of electric hammer, "Wolf" electric breast drill, drill stand |