| Year | 1950 |
| Date | 20-Apr |
| Volume | 102 |
| Issue | 2,552 |
| Page | 565 |
| Category | In The Workshop |
| Part | 61 |
| Title | Building the 3/8 in. Cowell Drilling Machine from Castings |
| Author | "Duplex" |
| Notes | The finished machine, spindle speeds, pulley groove angles, constructional details, the intermediate pulley mounting, the jockey pulleys, driving belts, the drilling table, drill chucks, lubrication, conclusion |