Page:The Boston cooking-school cook book (1910).djvu/236

 Fat is the white or yellowish oily solid substance forming the chief part of the adipose tissue. Fat is found in thick layers directly under the skin, in other parts of the body, in bone, and is intermingled throughout the flesh. Fat as food is a great heat-giver and force-producer. Suet is the name given to fat which lies about the loins and kidneys. Beef suet tried out and clarified is much used in cookery for shortening and frying.

Mineral Matter. The largest amount of mineral matter is found in bone. It is principally calcium phosphate (phosphate of lime). Sodium chloride (common salt) is found in the blood and throughout the tissues.

Water abounds in all animals, constituting a large percentage of their weight.

The color of meat is due to the coloring matter (hæmoglobin) which abounds in the red corpuscles of the blood.

The distinctive flavor of meat is principally due to peptones and allied substances, and is intensified by the presence of sodium chloride and other salts.

The beef creature is divided by splitting through the backbone in two parts, each part being called a side of beef. Four hundred and fifty pounds is good market weight for a side of beef.

The most expensive cuts come from that part of the creature where muscles are but little used, which makes the meat finer-grained and consequently more tender, taking less time for cooking. Many of the cheapest cuts, though equally nutritious, need long, slow cooking to render them tender enough to digest easily. Tough meat which has long and coarse fibres is often found to be very juicy, on account of the greater motion of that part of the creature, which causes the juices to flow freely. Roasting and broiling, which develop so fine a flavor, can only be applied to the more expensive cuts. The liver kidneys, and heart are of firm, close texture, and difficult of digestion. Tripe, which is the first stomach of the ox, is easy of digestion, but on accouut of the large amount of fat which it contains, it is undesirable for those of weak digestion.

The quality of beef depends on age of the creature and