84 MATER i A MEDIC A AND THERAPEUTICS. 



By far the most important application of permanganate of 

 potash is as a disinfectant and deodorant, apart from the human 

 body : to disinfect stools and foul discharges after removal from 

 the patient ; to wash utensils ; and to flush water-closets, etc. 

 Its great advantages are, that it is rapid and complete in its 

 action ; odourless and non-poisonous in solutions of ordinary 

 strength ; and that it shows by change of colour whether it is 

 acting or exhausted. The principal disadvantage connected 

 with it is its expense. 



vHYDKARGYRUM. Hg. 200. MERCURY. 



This metal is of the first therapeutical importance, 

 and a large number of salts and other preparations are 

 made from it. 



Hydrargyrum. Mercury. Hg. 

 Characters. A fluid metal, brilliantly lustrous. 

 Impurities. Lead, tin, etc. ; detected by being non-volatile. 



Preparations. 



a. Hydrargrymn cum Greta. 1, with 2 of Chalk. 

 Dose, 3 to 8 gr. 



b. Emplastrum Hydrargyri. 1 in 3. 



c. Emplastrum Ammoniac! cum Hydrargyro. 

 1 in IT 



d. Pihila Hvdrargvri. " Blue Pill." 1 in 3, with 

 Confection of Roses and Liquorice. Dose, 3 to 8 gr. 



e. Ungriflnfaim Hydrargyri. " Blue Ointment." 

 Nearly 1 in 2. 



From Unguentum Hydrargyri are prepared: 



a. Linimentum Hydrargyri. 1 of Ointment, to 

 1 of Liquor Ammonias, and 1 of Linimentum Cam- 

 phor 83. 



j8. Unguentum Hydrargyri Compositum. 

 6, with 7J Olive Oil, Wax, and Camphor. 



y. Suppositoria Hydrargyri. 5 gr. of oint- 

 ment in each. 



From Hydrargyrum are made : 



f. Ijvdrargyri Oxidum Rubruin. Red Oxide of 

 MercuryvTigO . 



Source. Made by triturating together and heating 



