Two HandsForms / rainfall ledger
Ardnamurchan Lighthouse, 1920–1930
UK rainfall ledger, 10-year sheetGemma-4-31B-ITidentity: 12 months = written annual total
!
7 of 11 years accepted; routed: 1921, 1924, 1928, 1930
A year is accepted only when its twelve monthly values sum to the clerk's handwritten annual total (within 0.01 in).
| Month | 1920 | 1921 | 1922 | 1923 | 1924 | 1925 | 1926 | 1927 | 1928 | 1929 | 1930 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 6.92 | 7.91 | 5.23 | 3.96 | 3.44 | 4.53 | 6.58 | 4.87 | 5.32 | 2.12 | — |
| Feb | 6.75 | 1.50 | 4.43 | 2.24 | 1.81 | 3.37 | 3.49 | 1.68 | 3.91 | 1.22 | — |
| Mar | 5.89 | 7.41 | 1.52 | 1.14 | 0.73 | 1.46 | 2.89 | 1.81 | 0.53 | 1.03 | — |
| Apr | 1.55 | 2.42 | 2.74 | 2.29 | 2.86 | 4.35 | 1.62 | 5.21 | 1.32 | 2.14 | — |
| May | 3.67 | 3.32 | 5.65 | 1.89 | 2.52 | 4.79 | 2.98 | 0.97 | 0.43 | 3.36 | — |
| Jun | 2.07 | 0.54 | 2.62 | 2.83 | 2.97 | 1.16 | 1.16 | 2.84 | 1.58 | 2.94 | — |
| Jul | 4.28 | 1.42 | 3.21 | 3.96 | 3.60 | 1.49 | 3.35 | 1.36 | 2.58 | 3.23 | — |
| Aug | 2.90 | 2.84 | 2.61 | 4.14 | 3.36 | 2.46 | 3.06 | 3.08 | 2.90 | 4.59 | — |
| Sep | 4.12 | 2.54 | 1.65 | 4.79 | 5.24 | 3.55 | 2.92 | 3.37 | 2.48 | 2.11 | — |
| Oct | 2.67 | 4.05 | 1.81 | 7.53 | 3.75 | 2.33 | 5.12 | 6.23 | 5.32 | 4.49 | — |
| Nov | 7.63 | 1.88 | 3.47 | 3.76 | 4.90 | 0.76 | 4.43 | 5.41 | 4.61 | 2.81 | — |
| Dec | 4.15 | 5.81 | 5.28 | 3.99 | 6.70 | 2.75 | 2.46 | 0.60 | 5.69 | 5.94 | — |
| Written total | 52.60 | 41.69 | 40.22 | 42.52 | 41.38 | 33.00 | 40.06 | 37.43 | 41.67 | 35.98 | — |
| Sum of months | 52.60 | 41.64 | 40.22 | 42.52 | 41.88 | 33.00 | 40.06 | 37.43 | 36.67 | 35.98 | — |
| ✓ | ✕ | ✓ | ✓ | ✕ | ✓ | ✓ | ✓ | ✕ | ✓ | ✕ |
Values as read by Gemma-4-31B-IT (whole sheet + 3 zoomed strips (page + 3 strips, docs/sources/ledger-rescue-pilot.md §3)). Amber shading: a routed year. Orange numbers differ from the volunteers' transcription (hover for their value); the gate never sees the volunteers' values, they only grade it.
Source: Rainfall Rescue, ARDNAMURCHAN-LIGHTHOUSE PDF page 9 (https://raw.githubusercontent.com/ed-hawkins/rainfall-rescue/master/DATA/ARDNAMURCHAN-LIGHTHOUSE/ARDNAMURCHAN-LIGHTHOUSE.pdf), volunteer transcription sourceERROR_TYRain_1920-1930_31_pt1-page-142.csv. Hawkins et al. (2022), Geoscience Data Journal; the source repository carries no licence file, so the sheet image is linked, not copied.