Page:The Boston cooking-school cook book.djvu/51

Rh '''2. By Refrigeration.''' Foods so preserved are kept in cold storage. The cooling is accomplished by means of ice, or by a machine where compressed gas is cooled and then permitted to expand. Examples: meat, milk, butter, eggs, etc.

3. By Canning. Which is preserving in air-tight glass jars, or tin cans hermetically sealed. When fruit is canned, sugar is usually added.

4. By Sugar. Examples: fruit-juices and condensed milk.

5. By Exclusion of Air. Foods are preserved by exclusion of air in other ways than canning. Examples: grapes in bran, eggs in lime water, etc.

6. By Drying. Drying consists in evaporation of nearly all moisture, and is generally combined with salting, except in vegetables and fruits.

7. By Evaporation. There are examples where considerable moisture remains, though much is driven off. Example: beef extract.

8. By Salting, There are two kinds of salting,&#151;dry, and corning or salting in brine. Examples: salt codfish, beef, pork, tripe, etc.

9. By Smoking Some foods, after being salted, are hung in a closed room for several hours, where hickory wood is allowed to smother. Examples: ham, beef, and fish.

10. By Pickling. Vinegar, to which salt is added, and sometimes sugar and spices, is scalded; and cucumbers, onions, and various kinds of fruit are allowed to remain in it.

11. By Oil. Examples: sardines, anchovies, etc.

12. By Antiseptics. The least wholesome way is by &pound;lie use of antiseptics. Borax and salicylic acid, when employed, should be used sparingly.