| Level | Item |
| Ref No | L/E/78/22 |
| Alt Ref No | E(L)/78/22 |
| Title | Industrial Rhythm \ Hijmans' Report \ Charts |
| Date | n.d. |
| Extent | 6 sheets |
| Description | Printed charts and diagrams from Ernst Hijmans' report, and one explanatory typed sheet in French. |
| Language | French |
| Physical Description | Original reference number was IR/F/1/c. Removed from L/E/75/26. Typed page numbered 7. |
| Format | Papers |