# Q22 · Instrument assignment

Memorandum · Source edition: 2

The brass doubling drawer belongs to instrument CARBON, not the weather. T-208 selects edition 2; the row of four readings is kept in Q42.

```json
{
  "instrument": "CARBON",
  "receipt": "T-208",
  "edition": 2,
  "example_record": "Q10",
  "ledger_record": "Q42"
}
```

## Related records

- [Q42 · Accepted Carbon reading ledger](/archive/quiet-index/r5/q42)
- [Q34 · Carbon rule, edition two](/archive/quiet-index/r5/q34)
- [Q10 · Doubling table](/archive/quiet-index/r5/q10)

Canonical: /archive/quiet-index/r5/q22
Revision: quiet-index-r5. The margins keep count.