petrol blue:

It will allow the account to stand, with liberty to the plaintiff to surcharge and falsify it

On the Continent, where common salt is heavily taxed, alum, carbolic acid, naphthalene and other materials are frequently added to it to “denaturise,” or render it incapable of being used as food, and these additions are often the cause of trouble to the tanner.

Which is a thing more easily said, than made good in the way of doing.