502 



DISEASES OF THE SKIN. 



plain zinc ointment (1 part of oxide of zinc to 9 of lard*) or lead 

 ointment, and especially Hebra's ointment (a mixture of equal 

 parts of plain litharge and paraffin ointment^). White precipitate 

 ointment must only be used for dogs with the greatest care, on 

 account of the danger of poisoning through licking. Among the 

 protective dressings we must especially recommend powders which 

 will adhere to the skin of the regions on which they are applied. 

 The following mixture may be used : Zinci oxidi 5 grammes, 

 amidon (starch) 20 grammes. 



2. For moist and impetiginous eczema we have used, for a very 

 long time and with success, a solution of caustic (argentum nitras), 

 6 per cent., which is applied by means of a brush upon the dis- 

 eased regions, thoroughly cleansed beforehand ; a dry scab is 

 formed under which healing progresses very rapidly. Among the 

 ointments we give the preference to nitrate of silver (1 per cent, in 

 paraffin ointment) or to tannin (tannic acid 5 grammes, paraffin 

 ointment 50 grammes). Drying powders are very efficient for 

 obstinate moist pi ocesses ; we generally prescribe a mixture of fine 

 iodoform powder and oak-bark 1 : 10, or cresol combined with 

 boric acid (2 to 4 per cent.). 



3. In chronic eczema our main remedy is tar — in a natural con- 

 dition, or in an alcoholic solution (beech tar and alcohol, of each 25 

 grammes), or in a liniment (tar and green soap) We may use the 

 following preparation against chronic impetiginous eczema : beech- 

 wood tar and green soap, of each 50 grammes, alcohol q. s. Four 

 to six days after the friction we may detach with care the dry scabs 

 then formed upon the diseased surfaces. In certain cases it is neces- 

 sary to make a second application. Tar liniment has the advantage 

 of being easily removed by bathing. At the present time we re- 

 place tar with cresol ; this is not at all toxic, and its action is equal 

 to that of tar ; it is proper to use it in the shape of liniment (cresol 

 and green soap, of each 100 grammes, alcohol 50 grammes), creo- 

 soted alcohol (1 : 10-20), or ointment (1 : 10-20 of paraffin oint- 



* This preparation has also this formula : 



R.— Vaseline 100 grammes. 



I ââ 20 " 



Oxide of zinc J 



Almond oil 10 " 



(Austrian Codex.) — N. d, t. 



' Paraffin ointment is composed of four parts of liquid paraffin and one part of 

 solid paraffin. — n. d. t. 



