| RGO Archives/RGO 9 contains: |
|---|
| <-- See earlier |
|---|
| 422 |
Correspondence on eclipse and transit occultations |
| 423 |
Correspondence on stellar parallax |
| 424 |
Correspondence on instruments |
| 425 |
Correspondence on variable stars and novae |
| 426 |
Correspondence on catalogued stars |
| 427 |
Correspondence on double stars and nebulae |
| 428 |
Correspondence on comets and meteors |
| 429 |
Correspondence on Eros observations |
| 430 |
Correspondence on observatories |
| 431 |
Correspondence with foreign observatories |
| 432 |
Correspondence with English observatories |
| See later --> |
|---|
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