“I presume this acid would be found very useful on board any vessel fitted out for long voyages; it appears from calculations on a small scale, that one hogshead of this acid would suffice to cure six tons of fish, in such a manner as to retain their nutritious quality; and they could be cured on board when opportunities occurred of procuring them, independent of its being an excellent substitute for common vinegar in many culinary purposes on board.”
“Mr. Sockett recommends that fish, as soon as practicable after taken, should be a little rubbed with salt, and laid upon a sloping board to drain, and when dry, to be dipped in the acid as before stated.”
“One great advantage attending this mode of curing hams or beef is, that when hung up they are never attacked by the flies.”
PICKLING OF FISH.
Fish may be preserved either by dry salting or in a liquid pickle. The former method is employed to a great extent on the banks of Newfoundland, and in Shetland. When a liquid pickle is used, the fish, as fresh as possible, are to be gutted, or not, and without delay plunged into the brine in quantity so as nearly to fill the reservoir, and after remaining covered with the pickle five or six days, they will be so completely impregnated with salt as to be perfectly fit to be re-packed in barrels, with large-grained solid salt, for the hottest climates and longest voyages.
The brine becomes frequently somewhat weaker at the top; to remedy this, some of the salt may be suspended in bags or otherwise, just under the surface, which will saturate whatever moisture may exude from the fish, and thus the whole of the brine will continue fully saturated and of the most strength.
Such brine, although repeatedly used, will not putrify, nor the fish, if kept under the surface, become rancid.
By this process great quantities of herrings may be salted when salt or casks are not on the spot, and the fish may remain for a great length of time immersed in this brine without the least injury.
From Mr. London’s statement, it appears that the brine ought always to contain a redundancy of salt; and in such case there is not the least danger of the fish putrifying or growing rancid, as the extra lumps of solid salt in the brine immediately act upon any watery or other liquors which proceed from the fish when inclosed in the cask.
For judging of the relative strength of different solutions of common salt, Mr. London recommends a glass bottle, with a ground-glass stopper, to be filled with brine made from a solution of solid salt in water; within this bottle are three glass bubbles, of different specific gravities, so graduated, that supposing the temperature of the air to be at sixty degrees of Fahrenheit’s thermometer, and only one bubble floats on the surface, and that it indicates the specific gravity of the brine to be 1.155, containing about 20 parts salt, and 80 of water, which is insufficient to cure animal matters with certainty by immersion in it.