The boil should be opened and drained and a three per cent solution of zinc sulphate injected.
Solution of zinc sulphate, one-half to three grains to the ounce.
The zinc is formed into a ring which fits the upper part of a glass beaker filled with zinc sulphate solution.
On the whole the higher strengths of zinc sulphate are less poisonous to peas than they are to barley.
zinc sulphate is sometimes used instead, as it reduces the wasteful consumption of the zinc, but it should be pure.
For field earth the limit of absorption of zinc oxide from zinc sulphate is between 21%–24% of the earth.
Three to eight grains of zinc sulphate to eight ounces of boric solution is a good regular eye-wash in these cases.
ZnO per litre (added in the form of zinc sulphate) no deleterious action was observed.
The two solutions are kept apart by gravity, as the copper sulphate is heavier than the zinc sulphate.
The zinc rod is kept in a solution of zinc sulphate contained in the porous cup.