| Edition | As printed | Type | Chars | Location | vs. previous |
|---|
| 1st ed. (1771) | DROME | cross-reference | 43 | vol. 2, p. 455 | |
| 6th ed. (1823) | ① DROME | article | 241 | vol. 7, p. 331 | |
| 7th ed. (1842) | ② DROME | article | 1,609 | vol. 8, p. 200 | |
| 8th ed. (1853–60) | ③ DROME | article | 4,803 | vol. 8, p. 180 | |