152] MAN Considerable quantities of man- ganese are eraplo)ed in glass-works for puritying glass ; as it destroys the eftects of colouring substances, and venders vitrified matters per- fecllj' clear ; from which property it has received the appellation of Soap of Glass, Farther, it imparts to a large quantity of glass, in a state of fusion, a purplish or red- dish tinge, that disappears if con- tinued in the fire : these colours may, according to Cronstedt, be easily etfaced by the calces of arse- nic or tin. — Manganese likewise communicates various tints to warm •water, such as green, purple, red, blue, &c. which change on agi- tating that fluid. — When distilled vith the muriatic acid, or spirit of salt, this mineral yields the oxyge- nated muriatic acid, or Bleaching Jjiquor of Berthollet. — It is also employed for glazing earthen-ware, ■which thus acquires a black co- lour. — After being calcined in a strong fire, it has been recom- mended medicinally, as an astrin- gent ; of which, however, we have had no experience, MANGE, a disease afFeAing dogs and swine, in a manner siau- lar to the itch in the human body ; •^nd arising from an insert ihat works its way beneath the upper- most skin; where it causes sogreat an irritation, that- the animals rub or scratch themselves, tearing olf the head of the pustule, which oc- ca.sions a scab and, in a short time, an ilceration. This disor- der, especially in dogs, originates from too high feeding, want of exercise, and an opportunity of jefreshing themselves with dog's- grass ; from being starved at home, ^o that the animals are compelled tp devour carrionj and excremeuLs MAN abroad; from want of water, e» neded of cleanliness in their ken- nels. It is induced in swine, by sutfering them to lie in their styes, without clearing away their or- dure. As the malady is entirely situat- ed in the skin, the cure may be etfeded in dogs, by giving them a small quantity of fine pulverized sulphur, either in milk, or incor- porated with butter, and rubbing them daily, for the space of a week, with an ointment consist- ing of sulphur and hog's-lard ; to which should be added a small portion of oil of turpentine. Ano- Uier remedy is obtained by boi'ing four ounces of quicksilver in two quarts of water, till the quantity be reduced to one half: with this liquid the animals are to be washed regularly, and ought also to take a small draught of it every day, during die continuance of the erup- tion. "With respeft to the mange in hogs, Dr. No E FORD (Anuals of Agriculture, vol, xv.) recommenus the following ointment, which sel- dom fails to efteft a perfecSt cure^ provided it be properly applied, and the animals be kept clean, after the disease is removed : — Take three ounces of hog's-lard, ore ounce of fine flour of sulphur, two drams of white hellebore, new- ly pulverized, and half an ounce of the water of kali, prepared in the shops. These ingredients are to be thoroughly incorporated, so as to form an unguent ; the whole of which is directed to be rubbed on the animal at one time, and is said to be suflicient for a hog of six or seven stone : if the oint- ment be properly applied, there will be no occasion for any repeti.- ' , tic;i»
