| Edition | As printed | Type | Chars | Location | vs. previous |
|---|
| 3rd ed. (1797) | PERKIN | cross-reference | 44 | vol. 14, p. 152 | |
| 4th ed. (1810) | ① PERKIN | article | 80 | vol. 16, p. 142 | |
| 5th ed. (1815) | ② PERKIN | article | 80 | vol. 16, p. 142 | |
| 6th ed. (1823) | ③ PERKIN | article | 80 | vol. 16, p. 142 | |