312 ARSENIC. 



of castor and olive oil. Opium, camphor, and ether, may be 

 resorted to, to quiet the nervous irritability ; and ammonia, in 

 large doses, has proved of service in stimulating the heart, where 

 its action has been irregular and feeble. But we must recollect 

 the inflammatory action of the stomach and bowels with which we 

 still have to contend, and consequently the stimulating system 

 must give way as soon as may be to a cooling regimen, mild 

 aperients, bleeding, and the usual remedies and treatment. The 

 debility, paralytic affections, and generally broken-down health, 

 are afterwards to be encountered by tonics, sea-bathing, warm and 

 cold, nervous stimulants, and a strict attention to diet, which 

 commonly should be nutritive, but light : milk, and farinaceous 

 food, in preference to animal diet."* 



Genus XII.— MERCURY. 



Mercure, Fr.; Mercurio, It.; Azoque, Sp.; Quicksilber, Gcr. ; Al>uc y Arivb. ; 

 Purada, Sans.; Parii h t Hind ; SIiwuy-yhi t Chin, 



Mercury or Quicksilver is found in the native state, and also 

 combined with silver, with sulphur, and with muriatic acid. Its 

 ores are not numerous ; they occur principally in veins or irre- 

 gular masses in strata of sand- stone, bituminous schistus, Secon- 

 ds 



dary limestone, and ferruginous clay. The most productive mines 

 in Europe are those of Almadin, near Cordova, in Spain, Tdria in 

 Carniola, the Lower Palatinate, and the Duchy of Deux Fonts. 

 At Guancacavclica, in Peru, the sulphuret exists in an enormous 

 mass, fifty yards in width, which has been worked to the depth of 

 500 yards ; it traverses sand-stone and lime-stone near the summit 

 of one of the Cordilleras, 1 2,000 feet above the level of the sea. 

 There are other mines of mercury in New Spain and Grenada. 



Sp. 1. Native Mercury. Pl. XLIV. fig. 1. — Gedieden 

 Queksilber, Werner ; Mercure natif, Haiti/.— Its colour is tin- 



* Mann il of Pharmacy^ p. 3<i. 



