| Year | 1918 |
| Date | 30-May |
| Volume | 38 |
| Issue | 892 |
| Page | 326 |
| Category | Workshop |
| Part | |
| Title | On the Use of Sparks as an Indicator of Various Steels |
| Author | John P.Blake |
| Notes | Paper read before the Society of Model and Experimental Engineers (SM&EE). The sparks from file steel, from low carbon steel, from a manganese steel, from vanadium & chrome steel, from chrome wolfram steel without vanadium |