The first class comprises those where the burn is altogether superficial, and merely reddens the skin; the second, where the injury is greater, and we get little bladders containing a fluid (called serum) dotted over the affected part; in the third class we get, in the case of burns, a charring, and in that of scalds, a softening or pulpiness, perhaps a complete and immediate separation of the part.

The serum of the blood is very rich in albumen, as is lean meat.

This remarkable process is known as coagulation, or the clotting of blood; and the liquid which separates from the clot is called serum.

The serum is almost entirely free from corpuscles, these being entangled in the fibrin.

A, serum; B, cupped upper surface of clot; C, white corpuscles in upper layer of clot; D, lower portion of clot with red corpuscles.

Take it off in half an hour, and a little clot will be seen in the watery serum.

The next day the clot will be seen floating in the nearly colorless serum.

Take some of the serum saved from Experiment 88 and note that it does not coagulate spontaneously.

In this disease the breathing becomes very painful, as the secretion of glairy serum is suspended, and the dry and inflamed surfaces rub harshly upon each other.

have been attacked by chronic bacillar dysentery; these are treated periodically with anti-dysenteric serum.

There are perhaps 6 light cases of malaria weekly, 3 to 5 cases of bacillic dysentery every month, treated with serum; 1 case of more serious dysentery was sent away to the English Hospital in Alexandria.

The horse's system straightway begins to elaborate the protective antitoxine, and there results from this one injection a sufficient amount of it to save the horse, although far too little to make the serum of his blood potent enough for medicinal use.

Then blood is drawn freely from the horse, and it is allowed to separate into clot and serum, the latter alone being the part destined for use.

This serum is tested on a small animal that has been inoculated with a deadly dose of the diphtheritic poison; if it saves the little creature from death, it is assumed to be potent enough for use on human beings, and, handled with all possible precautions against putrefaction or any contamination with pathogenic bacteria, it is furnished to physicians, its degree of potency being designated in "units.

To change for a moment to a topic akin to the germ theory of disease, the reader may be reminded that the antitoxine treatment of infectious disease involves in almost every instance the use of some product contained in the serum (that is to say, the watery part of the blood).

This leads to the subject of the use of natural and artificial serum in the treatment of disease.

To quote again from the article entitled, "The Nineteenth Century in Medicine" ("New York Medical Journal," Dec. 29,1900): "It has been observed that the normal serum of certain animals that are insusceptible to particular infectious diseases, if injected into the human blood current or even into the subcutaneous tissue, confers more or less of immunity against those diseases....

Artificial serum seems to have been first employed by Edmund R. Peaslee as a benign application to the peritonaeum in the operation of ovariotomy.

fluid, inelastic fluid; liquid, liquor; lymph, humor, juice, sap, serum, blood, serosity^, gravy, rheum, ichor^, sanies^; chyle [Med.].

Water N. water; serum, serosity^; lymph; rheum; diluent; agua [Sp.], aqua, pani^. dilution, maceration, lotion; washing &c v.; immersion^, humectation^, infiltration, spargefaction^, affusion^, irrigation, douche, balneation^, bath.

Victus eorum caseo et laete consistit, potus aqua et serum; pisces loco panis habent; ita multos annos saepe 250 absque medico et medicina vivunt.

A wife enclosed a letter from her husband, telling how he was suffering from the cold because of insufficient clothing; a doctor wrote protesting because there was not a single bottle of antitetanic serum in his field-hospital.

Also in blood serum they grow very richly.

In gelatine cultures the comma bacilli can be cultivated for six weeks, and also in blood serum, milk, and potato, where anthrax bacilli rapidly form spores.

The girl who attends private schools only, is almost invariably inoculated with the serum of aristocracy.