Biting Bath.
(Waterhouse.)
| No. 1, | sp. grav., | 1.444; | ap. per ct. of | Fe2, Cl6 = | 47 |
| No. 2, | " | 1.375; | " | " | 41 |
| No. 3, | " | 1.339; | " | " | 38 |
| No. 4, | " | 1.313; | " | " | 35 |
| No. 5, | " | 1.225; | " | " | 27 |
A stronger solution of 48 deg. has been tried (by the above) but has no penetrating power through even the thinnest film.