SODIUM SULPHATE 193 



of water to kill developed bacteria, and it has no effect on 

 spores. 



It has been prescribed in the same doses as the bicarbonate 

 in gastric irritation. It is a useful antiseptic in aphthous and 

 ulcerated conditions of the mouth and fauces, is sometimes 

 conjoined with potassium chlorate, and applied either in 

 powder or with ' Sanitas,' or glycerin and water. It allays 

 irritation and itching in many cases of erythema, eczema, 

 and psoriasis. It is preferable to more active and 

 poisonous remedies for dogs, which are apt to lick their 

 dressings. In acute eczema one part each of borax and alum 

 is used, dissolved in fifty parts of water. It is an effectual 

 injection for leucorrhcea. It is a good solvent for salicylic 

 and benzoic acids. Glycerin of borax is made with one part 

 of borax and six of glycerin. Mel Boracis is composed of 

 2 parts borax, 1 of glycerin, and 16 of honey. 



DOSES. Horses and cattle, 3 n 'j. to 3vj. ; sheep and pigs, 

 3J. to 3iij- ; dogs, grs. v. to grs. xxx. 



Sodium Perborate, prepared by the action of boric acid on 

 sodium peroxide, is a white powder, soluble in water, and 

 employed as a substitute for hydrogen peroxide in the 

 dressing of wounds. 



SODIUM SULPHATE. Sodii Sulphas. Sulphate of Soda. 

 Glauber's Salt. Na 2 SO 4 .10Aq. 



The sulphate effloresces on the surface of the soil in various 

 parts of India, occurs in masses in Spain, and is a constituent 

 of sea- water, of many aperient mineral waters, of various 

 plants, and of several animal secretions. When two parts 

 sodium chloride are heated with one part sulphuric acid, 

 hydrochloric acid is evolved, and sodium sulphate crystallises 

 from the solution. It occurs in colourless, transparent, 

 oblique prisms, which effloresce on exposure to air, have a 

 saline, bitter taste, and at 60 Fahr. are soluble in less than 

 their own weight of water. 



ACTIONS AND USES. According to the dose it is laxative 

 or cathartic, slightly diuretic, febrifuge, and indirect 



olagogue. Externally it is refrigerant. 



Unlike the magnesium sulphate, it has no toxic effect when 



N 



