| RGO Archives/RGO 9 contains: |
| <-- See earlier |
| 93 |
Correspondence on the 30-inch telescope |
| 94 |
Correspondence on a hollow pentagon |
| 95 |
Correspondence on chronographs |
| 96 |
Correspondence on instruments |
| 97 |
Letter regarding magnetic instruments |
| 98 |
Letter regarding a rain recorder |
| 99 |
Correspondence on the Melbourne Transit Instrument |
| 100 |
Correspondence on telescopes |
| 101 |
Correspondence on the mirror transit instrument |
| 102 |
Correspondence on the meridian circle |
| 103 |
Correspondence on the Yapp Telescope |
| See later --> |