206 ANTACID AND SEDATIVE 



acidity concurs with constipation, sodium bicarbonate is 

 preferable in the proportion of a drachm to the pint of 

 milk. Lime-water is occasionally given as an antidote in 

 poisoning by the mineral acids and by carbolic and oxalic 

 acids. In the form of enema, it brings away ascarides 

 lodged in the lower bowel. Mixed with oil, glycerin, or 

 vaseline, with a little boric or carbolic acid, it is- applied 

 in aphtha and is occasionally substituted for zinc oxide in 

 cases of eczema. Scalds and burns are often treated with 

 Carron oil which consists of lime-water mixed with an equal 

 quantity of linseed oil. The more recent treatment consists 

 in the immediate application of layers of cotton wadding 

 with gentle and equable pressure. Lime in solution (lime- 

 wash) is used for cleansing and deodorising stables, cow- 

 houses, and piggeries. 



DOSES, etc. Of quicklime, horses and cattle take 1. to 

 3ij. ; sheep, grs. xx. to grs. xxx. ; dogs, grs. v. to grs. xx. 

 Of lime-water the larger patients take f iv. to f v. ; and 

 the smaller, f3ij- to fi., given alone, or with glycerin, oil, 

 or milk. Two ounces each of lime-water and gentian in- 

 fusion, repeated twice or thrice daily, often checks diarrhoea 

 in feeble calves ; half the dose answers for sheep. For 

 calves and dogs, saeeharated lime-water is used as an antacid 

 and stomachic. It is made by rubbing an ounce of slaked 

 lime with two ounces of sugar, transferring the mixture to a 

 bottle containing a pint of water, shaking, and separating 

 the clear solution with a syphon. It conveniently renders 

 the milk alkaline, without diluting it as does lime-water. 



CALCIUM CARBONATE . Calcii Carbonas . Carbonate of Lime . 

 Chalk. CaC0 3 . 



Calcium carbonate occurs in the several forms of limestone, 

 marble, calcareous spar, and chalk. When chalk is triturated 

 with a little water, agitated with a larger quantity of water, 

 and the mixture allowed to stand, the coarser fragments 

 and foreign matters subside. The clear liquid is poured or 

 syphoned off, and slowly deposits an impalpable powder, 

 which, when dried in blocks, constitutes whiting, and when 

 in smaller conical rolls is ereta praeparata. Precipitated 



