There is a considerable difference in the qualities of muscular flesh, according to the size of the animal, and also according to its activity. The small mountain sheep, for example, which has to encounter fatigue to procure its food, has flesh of a different quality and flavour from the large and lazy creature, which feeds luxuriously and fattens rapidly, in the rich pastures of the plain country. The beef of the western islands also, is more esteemed, on account of the same circumstance, than that of the fat and brawny oxen which we see in the London market. It is for this reason, we have no doubt, that the flesh of the horse, the rhinocerus, and elephant, is not used as food except in cases when other food is not to be procured. In the circumstance of activity altering the qualities of flesh, we may be allowed to instance the superiority of venison to beef, in flavour and tenderness, and easiness of digestion.
The age of animals is another circumstance which has great influence on the qualities of their flesh. The flesh of young animals is composed of less rigid fibres, and has fewer vessels which carry red blood running through it, and besides, it has less of the peculiar flavour of its particular species than the flesh of older animals. Gelatine is more abundant in the young, and fibrin in the old; hence the former is more bland and tender. Veal and lamb, for example, are more tender and gelatinous than beef or mutton; sucking pigs, chickens, and ducklings, are also much more delicate than the grown animals. The beef of an old cow, however well fed, is quite tough and unpalatable, while that of a very young heifer is much relished. Although, however, very young animals be so much more tender, yet they are insipid and flabby.
In the case of pork, age is not required, as in other sorts of butcher meat, to mellow the fibre. It is an aliment containing much nourishment; but to some palates its flavour is disagreeable, though by most people it is relished. It was much used by the ancient athletæ, as half raw beef steaks are now by our men of the fancy.
Sucking pigs are killed when three weeks old; and for pork, pigs are killed from six to twelve months old. It requires them to be older for making brawn. The flesh of young venison is not so good as when four years old or more; though that of the fawn is very tender and succulent.
But even in the fœtal state, the flesh of animals, if recently taken from a healthy mother, may be used. In the London market the fœtus of the cow is regularly sold to the pastry-cooks for the purpose of making mock turtle soup, of which it often forms the principal portion.
Veal, however, is reckoned not so good when killed before it be eight or ten weeks old. The most remarkable quality of flesh of this kind is, its almost wholly dissolving in boiling water, forming in the warm state a bland and gelatinous soup, and when cold, concreting into a tremulous transparent jelly. It is less animalized, or more properly speaking, contains less animal fibre than almost any other flesh; hence its tendency to become ascescent when made into broth and jelly, which is not the case with beef or mutton broth. The parts of older animals, which contain a larger portion of gelatine, are in this respect similar to young flesh. Cow-heel and sheep’s-head are well known instances. It may be remarked that such food is less nutritious, and unless very much boiled, is less digestible than muscular flesh; but as it is also more light and less stimulating, it is frequently given to delicate people who cannot take any thing stronger.
Tripe is intermediate between what we have just described and the muscular flesh of grown animals, insomuch as there is in the stomach of ruminant animals a considerable proportion of vessels, transmitting red blood, and of muscular fibres, and accordingly it is to be inferred that tripe is more nutritive; it is certain it is more palatable and savory.
As to other parts of animals, which are abundantly furnished with red blood, though destitute of muscle, we cannot speak so decidedly. Some of the glands are coarse and rank flavoured, from the peculiar secretions which they produce, and are only used by poor persons; others are esteemed as delicacies, and seem not to be unwholesome. As examples of the latter, we may mention sweet bread or pancreas, one of the glands belonging to the digestive organs; and the liver of some species of birds, and of young quadrupeds.
The liver of the goose reckoned a great delicacy in Sicily, and they have there a a method of enlarging this organ while the bird is alive, but it is so cruel, that Brydon, who mentions it, declines giving the particulars, lest our epicures in England should have the inhumanity to give it a trial. The spleen is an instance of the former case, being strongly ill flavoured.
Another circumstance which produces difference of quality in flesh, is the sex of the animal, the genital organs having in this respect a very remarkable influence, as appears from the effect of destroying these by castration. This renders the flesh of the male similar, and in some cases, as in mutton, superior to that of the female, which is always more tender, and of finer fibre than that of the uncastrated male. By destroying also the ovaries of the females, their flesh is rendered more delicate, though this operation is not often practised. The sow is the animal which is most usually operated upon with this view; the flesh of the uncastrated boar is very coarse and bad. Even in calves the difference is observable, and veal is greatly improved by castrating the males. The same practice greatly improves fowl, as in capons. Venison is rank, tough, lean, and ill flavoured, and not fit to be eaten when killed during the rutting season, in September and October; and salmon, when about to spawn, are also bad, and prohibited, we believe, by our laws, to be caught or sold.