| RGO Archives/RGO 9 contains: |
| <-- See earlier |
| 89 |
Correspondence on spectroscopes |
| 90 |
Correspondence on spectroscopic equipment |
| 91 |
Correspondence on the transit circle |
| 92 |
Correspondence on the Cookson Telescope |
| 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 |
| See later --> |