| 2nd Series, Typical elements | 4th Series | 6th Series | 8th Series | 10th Series | 12th Series | ||
|---|---|---|---|---|---|---|---|
| vol. ii. 70 | vol. ii. 90 | vol. ii. 91 | vol. ii. 91 | ||||
| IV. | Si 28 | Ge 72 | Sn 119 | — | Pb 207 | ||
| vol. ii. 99 | vol. ii. 124 | vol. ii. 125 | vol. ii. 134 | ||||
| V. | P 31 | As 75 | Sb 120 | — | Bi 209 | ||
| vol. ii. 149 | vol. ii. 179 | vol. ii. 186 | vol. ii. 189 | ||||
| VI. | S 32 | Se 79 | Te 125 | — | — | ||
| vol. ii. 200 | vol. ii. 270 | vol. ii. 270 | |||||
| VII. | Cl 35·5 | Br 80 | I 127 | — | — | ||
| vol. i. 459 | vol. i. 494 | vol. i. 496 |
Note.—Two lines under the elements indicate those which are very widely distributed in nature; one line indicates