Armagh Meteorological Record Formats for December 1926
The format of the meteorological readings has changed many times over the years but the readings for December 1926 can be interpreted using the following table. The Column number refers to the columns on the readings counted from left to right and the Contents refers to the instrument or measurement being recorded.
| Column | Contents |
| First Reading | |
| 1 | Date |
| 2 | Barometer |
| 3 | Attached thermometer |
| 4 | Dry |
| 5 | Wet |
| 6 | Wind direction |
| 7 | Wind force |
| 8 | Cloud amount |
| 9 | Cloud form |
| 10 | Weather at times of obs |
| 11 | Weather since last obs |
| 12 | Rain gauge 8 inch |
| 13 | Rain gauge Auto |
| 14 | Inches total |
| 15 | mm 8 inch |
| Second Reading | |
| 1 | Date |
| 2 | Temperature |
| 3 | GA & IE |
| 4 | Barometer |
| 5 | Humidity percentage |
| 6 | VT |
| 7 | Temperature in grass |
| 8 | Ground temperature 1ft |
| 9 | Ground temperature 4ft |
| 10 | Visability |
| Third Reading | |
| 1 | Date |
| 2 | Barometer |
| 3 | Attached thermometer |
| 4 | Dry |
| 5 | Wet |
| 6 | Wind Direction |
| 7 | Wind force |
| 8 | Cloud amount |
| 9 | Cloud form |
| 10 | Weather at time of obs |
| 11 | Weather since last obs |
| 12 | Max (corrected) |
| 13 | Min (corrected) |
| 14 | Grass min |
| Fourth Reading | |
| 1 | Date |
| 2 | Temperature |
| 3 | GA & IE |
| 4 | Barometer |
| 5 | Humidity percentage |
| 6 | VT |
| 7 | Sunshine |
| 8 | Visability |
