Armagh Meteorological Record Formats for May 1938
The format of the meteorological readings has changed many times over the years but the readings for May 1938 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 | Attached thermometer |
| 3 | Barometer (mb) |
| 4 | Barometer (ins) |
| 5 | Humidity percentage |
| 6 | VT |
| 7 | Temperature in grass |
| 8 | Ground temperature 1ft |
| 9 | Ground temperauter 4ft |
| 10 | Visability |
| 11 | Remarks |
| 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 | Attached thermometer |
| 3 | Barometer (mb) |
| 4 | Barometer (ins) |
| 5 | Humidity percentage |
| 6 | VT |
| 7 | Sunshine |
| 8 | Visability |
| 9 | Remarks |
