| Edition | As printed | Type | Chars | Location | vs. previous |
|---|
| 1st ed. (1771) | ① DRAINS | article | 272 | vol. 2, p. 452 | |
| 2nd ed. (1778–83) | ② DRAINS | article | 27,160 | vol. 4, p. 2524 | |
| 3rd ed. (1797) | ② DRAINS | article | 27,076 | vol. 6, p. 104 | reprint · J 0.96 |
| Suppl. 3rd (1801) | ③ DRAINS | article | 18,130 | vol. 1, p. 496 | |