The salting and curing of the fish is done chiefly at Mataria, on Lake Menzala, and at Damietta.
One explanation has been sought in the legend of St Nicholas miraculously restoring to life three rich youths, who had been murdered, cut up and concealed in a salting tub by a thievish innkeeper or butcher, in whose house they had taken lodging.
In medieval times the salting and sale of herrings and the sale of cod, fish and other products of the North Sea fishery were the only industries.
There is no separation of underlyes in potash soap, consequently the product contains the whole constituents of the oils used, as the operation of salting out is quite impracticable owing to the double decomposition which results from the action of salt, producing thereby a hard principally soda soap with formation of potassium chloride.
In Burma the favourite relish of nga-pi is prepared from fish; and at Goalanda, at the junction of the Brahmaputra with the Ganges, and along the Madras coast many establishments exist for salting fish in bond.