| Reference number | MS/525/6/6/2/22 |
| Level | Item |
| Title | Letter from Dugald Clerk to Joseph Edward Petavel, Physical Laboratory, The University, Manchester |
| Date | 10 March 1915 |
| Description | Agreeing with Petavel that the first scheme would not work, requiring too much gas, or an impractical rate of oscillation in the mine. He is working on an alternative arrangement. He is very impressed with Petavel Artful Didger idea and suggestes that Petavel sets to work himself to carry it out. He is sending to Trinity House for the clock. |
| Extent | 2p |
| Format | Carbon copy |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA7825 | Clerk; Sir; Dugald (1854 - 1932); mechanical engineer | 1854 - 1932 |