OF FARRIERY. 



Medicinal Uses. — In small doses (and with 

 great attention,) from 3 j to 3 j, frequently 

 giving it, will produce sedative effects ; but if 

 the effect be not narrowly watched, or if the 

 dose be increased from 3 j, nausea will be 

 produced and violent irritation. 



Externally it is combined with oil. It may, 

 however, be used with advantage in affections 

 of the skin, either in the form of decoction or 

 ointment. 



ZINCI OXYDUM 



OXIDE OP ZINC. 



This is made by throwing small pieces of 

 z\n^ gradually, into a deep crucible, placed 

 obliquely in the furnace, and made of a white 

 heat ; it should be so placed that the zinc 

 may be exposed to the air, and that it may be 

 frequently stirred with an iron spatula. The 

 oxide, as it is formed, is to be taken out, and 

 treated in the manner as directed for the pre- 

 paration of chalk. 



Medicinal Uses. — Tonic ; but gives place to 

 the following : 



ZINCI SULPHAS. 



SULPHATE OF ZINC. WHITE VITRIOL. 



Take of Zinc, in small pieces - 4 ounces. 

 Sulphuric acid (by weight) do. 

 Distilled water - - 4 pints. 



Mix them in a glass vessel, and the efferves- 

 cence having ceased, filter the .solution through 



paper, then boil it till a pellicle appears ; set 

 it by 4,hat chrystals may form. 



Deoompositinn. — The same process acts 

 here as in the preparations of the sulphate of 

 iron and copper ; the oxygen of the water 

 unites to the zinc, converting it into an oxide 

 of zinc, which is dissolved by the sulphuric 

 acid forming sulphate of zinc, whilst the hy- 

 drogen of the water assumes the elastic form 

 and escapes. 



Medicinal Uses. — Tonic, internally ; stimu- 

 lant, externally. As a tonic, it is given in 

 doses from 3 j to j ss ; but it is now rarely used 

 at the College. It is used externally to pro- 

 mote healthy granulations ; it may be used 

 either in the form of solution or ointment. 



ZINGIBERIS RADIX. 



GINGER ROOT. 



This plant is a native of the East Indies, 

 but is now cultivated in the West Indies, to 

 very great advantage. Our finest quality 

 comes from Jamaica ; the root is dug up after 

 the herbaceous part of the plant is withered 

 in January, and dried in the sun. There are 

 many sorts in the market, but they all pos- 

 sess the like qualities, differing slightly in 

 strength, but none in flavour and appearance. 



Medicinal Uses. — Carminative, in doses 

 from J ss to I ij ; in the form of ba.l it is the 

 active ingredient in the formulae, bolus car- 

 ieavae 



