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Already we have found the wax that coats the palm-tree of the Andes of Quindiu, the silk of the palm-tree of Mocoa, the nourishing milk of the palo de vaca, the butter-tree of Africa, and the caseous substances obtained from the almost animalized sap of the Carica papaya.
In a series of comparative experiments, 200 grammes of sugar-candy being used in each case, we found that whilst saccharomyces pastorianus effected a complete fermentation of the sugar, the caseous ferment did not decompose more than two-thirds, and the ferment we have designated NEW "HIGH" FERMENT not more than one-fifth: and keeping the flasks for a longer time in the oven had no effect in increasing the proportions of sugar fermented in these two last cases.
The ulcers and sinuses persist indefinitely, or they heal and then break out again; sometimes the skin becomes infected, and a condition like lupus spreads over a considerable area. Spontaneous healing finally takes place after the caseous tubercle has been extruded; the resulting scars are extremely unsightly, being puckered or bridled, or hypertrophied like keloid.
But if he offer to sell me a ton of this lunar cheese, I call on him to prove the truth of the caseous nature of our satellite, before I purchase. It is not necessary to prove the falsity of the phrenological statement. It is only necessary to show that its truth is not proved, and cannot be, by the common course of argument.
When the skin is broken and caseous tuberculous tissue is exposed, healing is promoted by cutting away diseased skin, removing the granulation tissue with the spoon, scraping sinuses, and packing the cavity with iodoform worsted and treating it by the open method and secondary suture if necessary. Exposure to the sunshine on the seashore and to the X-rays is often beneficial in these cases.
In these last they are most frequently mixed with other substances hurtful as food; but of which the separation might perhaps be obtained by chemical processes. A vegetable milk becomes nourishing when it is destitute of acrid and narcotic principles; and abounds less in caoutchouc than in caseous matter.* It is this albumen contained in their juice which renders them so hard when boiled.
Old milk left in the receptacle of the teat soon changes into a curdy state, and the caseous matter not being at once removed by the next milking, is apt to irritate the lining membrane of the teat during the operation, especially when the teat is forcibly rubbed down between the finger and thumb in stripping.
The juice has been since examined by Vauquelin, and this celebrated chemist has very clearly recognized the albumen and caseous matter; he compares the milky sap to a substance strongly animalized to the blood of animals; but his researches were confined to a fermented juice and a coagulum of a fetid smell, formed during the passage from the Mauritius to France.
Gross lesions such as caseous foci in the marrow of the adjacent bone show as clear areas with an ill-defined margin; a sclerosed focus gives a denser shadow than the surrounding bone, and a sequestrum presents a dark shadow of irregular contour, and a clear interval between it and the surrounding bone.
There are still circumstances, however, in which an operation is required; for example, in disease of the lymph glands for the removal of inert masses of caseous material, in disease of bone for the removal of sequestra, or in disease of joints to improve the function of the limb.
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