256 INORGANIC AGENTS 



Sulphuric acid is utilized in acute lead poisoning, as an 

 antidote, to form insoluble sulphates in the bowels. The 

 acids are given for their remote astringent action in arrest- 

 ing or preventing haemorrhage (purpura) from internal 

 organs, and in diminishing excessive sweating and mucous 

 discharges ; but are inferior to other agents in the treatment 

 of these conditions. 



Administration. — The acids should all be thoroughly- 

 diluted with water for internal use. 



AciDUM BoRicuM. Boric Acid. H, B O,. (U. S. & B. P.) 



Synonym. — Boracic acid, E.; acide borique, Fr.; acidum 

 boracicum, sal. sedativum Hombergii, borsaure, G. 



Derivation. — Made by evaporation and crystallization of 

 solutions obtained by passing steam issuing from rocks in 

 volcanic regions of Italy, through water ; or by the action 

 of hydrochloric or sulphuric acids upon borax. Nag B^O, 

 (borax) + 10 H,0 + 2 H CI = 4 H3B 0, + 2 Na CI + 5 H,0. 

 Recovered by filtration and recrystallization. 



Properties. — Transparent, colorless scales, of a some- 

 what pearly lustre, or, when in perfect crystals, six sided 

 triclinic plates, slightly unctuous to the touch ; odorless, 

 haviug a faintly bitterish taste, and permanent in the air. 

 Soluble in 25.6 parts of water and in 15 parts of alcohol; 

 also soluble in 10 parts of glycerin. It is feebly acid. 



Dose. — Foals and calves., gr.xx.-xxx. (1.3-2.). 



PREPARATION. 



Olyceritum Boroglycerini. Glycerite of Boroglycerin. (l/. S. P.) 



Synonym. — Glycerite of glyceryl borate, solution of boroglyceride. 

 Boric acid, 310; glycerin to make 1,000. Solution prepared by heat 

 (303° F.) 



SoDii Boras. Sodium Borate. Na^B.O,. (U. S. <fe B. P.) 



Synonym. — Borax, natrum biboricum, boras, boras sodi- 

 cus, E.; borate de soudre, Fr.; borsaures natron, G. 



