140 PARASITIC SKIN DISEASES. 



warm water, to which add a quarter of an ounce of carbonate of 

 potash to the quaxt of water. As an external application any of 

 the following might be used advantageously : — 



(1.) Croolin 



Water 

 (■2.) Creosote ... 



Alcohol 



Water 

 (3.) Corrosive sublimate 



Dilute prussic acid 



Water 

 (4.) Sulphur ointment. 

 (5 ) A decoction made by boiling an ounce of strong 



tobacco in a pint of water. 

 (6.) Sulphur ... ... ... ... ... 2 oz. 



(1)1 of tar ... 

 Common oil 

 (7.) Kerosene (paraffin) oil 

 Common oil 



2 „ 

 1 pint. 



1 part. 



2 parts. 



(8.) A mixture of three parts of benzin, and one part each 

 of oil of cade and ooal-tar. 



When using one of the oily applications or a solution of tobacco 

 for sarooptic mange, dress only one half of the body at a time ; 

 and the other half, a day or two afterwards. Paraffin oil is apt to 

 have an irritating effect on the skin. At the same time it is sucii 

 an effective parasiticide, and can be so easily procured, that it is 

 second to none as a basis for a mange dressing. If, by irritating 

 the part, the proportion of paraffin oil be found to be too large, it 

 may be lessened by adding more common oil to it. The employ- 

 ment of corrosive sublimate and mercurial ointment may give rise 

 to symptoms of poisoning by absorption, and should be limited to 

 oases of psoroptic or symbiotic mange, in which the surfaces treated 

 are of much less extent than in sarcoptic mange. Two or three 

 days after the first application, wash the skin as before, and repeat 

 the dressing. 



The applications should not be oontinued unnecessarily, or used 

 too strong, lest they set up an irritable condition of the skin which 

 there may be difficulty in distinguishing from the original com- 

 plaint. Symbiotes require far less energetic measures for their 

 eradication than either of the two other kinds of mange parasites. 

 As the eggs and egg-laying females of the sarooptes are concealed 

 in galleries underneath the scarf-skin, the treatment of this form 

 of mange should be continued, off and on, for about a fortnight, by 

 which time all the eggs will probably be hatched, and the young 

 ones destroyed on coming forth. 



