| Level | Item |
| Ref No | L/E/64/49 |
| Alt Ref No | E(L)/64/49 |
| Title | Industrial Rhythm \ Job Effort Graph and its Application, The |
| Date | n.d. |
| Extent | 8 sheets |
| Description | Two versions of a typed manuscript with handdrawn diagrams, one marked 'Pilkington'. |
| Language | English |
| Physical Description | Original references are 37/L/092/01/64/3 and IR/J/11a. Pages numbered 2-7, 2-5. |
| Format | Papers |