38 MATER i A MEDIC A AND THERAPEUTICS. 



Preparation. 



^ Arsenia 



water. Dose. 5 to 1 0" min. 



Liquor Soda) Arseniatis. 4 gr. dried to 1 oz. 

 r. Dose, 



J. Sodse Chloratse Liquor. Solution of Chlorinated 

 Soda. 



(Source. Made by passing a stream of Chlorine gas 

 through a solution of Carbonate of Soda. 



Characters. A colourless liquid, with an odour of 

 chlorine and an astringent taste ; alkaline. A mixed 

 solution of hypochlorite of soda, chloride of sodium, and 

 carbonate of soda. 



Dose. 10 to 20 min. 



Preparation. 

 Cataplasma Soda? Chloratae. 



2. Sodii Chloridum. Chloride of Sodium. Com- 

 mon salt. NaCl. 



Source. Native. 



Characters. Small white crystalline grains, or transparent 

 cubic crystals, free from moisture, with purely saline taste. 

 1 part soluble in 2f parts of water. 



Dose. 10 to 240 gr. 



Sodii Chloridum is used in malting : 



Acidum Hydrochloricurn, Hydrargyri Perchlori- 

 dum, and Hydrargyri Subchloridurn. 



3. Sodae Nitras. Nitrate of Soda. NaN0 8 . 

 /Source. Native ; purified by crystallisation from water. 

 Characters. Colourless obtuse rhombohedral crystals, 



with a cooling saline taste. 



Impurities. Sulphates and chlorides. 

 Sodce Nitras is used in making : 

 Sodse Arsenias. 



4. Sodse Biboras. Biborate of Soda. Borax. 

 Na 2 B 4 7 .10H 2 0. 



Source. Native. 



Characters. Transparent colourless crystals, slightly 

 efflorescent, weakly alkaline. 1 part soluble in 22 parts of 

 cold water, or in 1 part of glycerine. 



. 5jto_40jgr. 



Preparations. 



a. Glycerinium Boracis. 1 to 4. 

 b Mel Boracis. 1 in 8. 



