As by inspection we see that the smallest rings weigh 13 and 14 grs. Troy, and the next three 29, 31, 32 respectively, which look like the double of the smaller, I shall group the rings according as they approximate to the multiples of 15.
| Multiples of 15 | Actual Ring Weights (Royal Irish Acad.) | Multiples of 15 | Actual | Rings | Weights |
|---|---|---|---|---|---|
| 15 | 13, 14 | 180 | 179 | 345 | |
| 30 | 29, 31, 32, 36 | 195 | 199, 203 | 360 | |
| 45 | 40, 46 | 210 | 206, 209 | 375 | 372 |
| 60 | 54, 56, 58, 59, 61, 65, 65 | 225 | 220 | 370 | |
| 75 | 69, 73 | 240 | 247 | ||
| 90 | 84, 84, 88, 96 | 255 | 259 | ||
| 105 | 98, 104, 111 | 270 | |||
| 120 | 121, 124 | 285 | 283, 283 | ||
| 135 | 300 | ||||
| 150 | 144, 144, 147, 147, 150, 151 | 315 | 322 | ||
| 165 | 171,172 | 330 | 332 |
A glance at the foregoing table shows that the most numerous group of rings occurs at the fourfold (60), no less than seven specimens ranging themselves at that point, next we find six specimens