The disulphonate is more readily obtained by moistening the nitrilosulphonate with dilute sulphuric acid and letting it stand for twenty-four hours, after which it is recrystallized from dilute ammonia.
Similar to the " etched figures " produced 7' by moistening an octahedron of alum, and have probably been produced, like them, by the action of some solvent.
The water used may be turbid or clear, and it acts, not only for moistening the soil, but as manure.
For the same purpose a small quantity of water (up to 2%) may be added either by moistening the clinker or by blowing steam into the mills in which the clinker is ground.
The uniform moistening of the fibre in this machine facilitates the subsequent operations, indeed the introduction of this preliminary process (originally by hand) constituted the first important step in the practical solution of the difficulties of jute spinning.