ELEPHANTIASIS. 767 



skin and subcutaneous tissue, there may also be noticed 

 atrophic alterations of muscular elements wherever these are 

 included in the area of the disease. 



Causation. — This condition of steady hypertrophy of skin 

 and other associated structures appears in all instances directly 

 dependent on lymphangitis, the extent and rapidity of the 

 changes being in direct relation to the severit}'- of the inflam- 

 mation. Although the hyperplastic dermal activities are only 

 set in motion by the inflammatory affection of the lymphatics, 

 and while every fresh attack may give a renewed impetus to 

 the development of particular tissue-elements, the hyperplastic 

 changes, when once started, seem to go on even between these 

 repeated onsets of lymphangitis, only receivmg a fresh and 

 more jjowerful impetus on the occasion of each attack. 



Treatment. — This may be palliative ; but seldom, when once 

 established, is the condition reversed. Of all which have been 

 recommended and tried, a judicious combination of purgative 

 and diuretic medicine with a rather liberal use of tonics, 

 vegetable and mineral, together with steady exercise or work, 

 and the employment of daily enunctions with a compound of 

 mercurial and iodine ointment, is more likely to be productive 

 of good than aught else. The more heroic treatment, by the 

 local use of cantharides blisters, issues, or the actual cautery, 

 has in my hands been provocative rather of more serious 

 results. 



B. ATROPHIES. 



True atrophic changes in the horse's skin, apart from such 

 as follow continuous circumscribed pressure, are not often 

 observed. Of the accessory structures, the hairs are found to 

 suffer from this change more than others. This condition, 

 however, will be again noticed under another class. 



C. NEW FOR^IATIONS, OR HETEROLOGOUS GROWTHS. 



Under this group are gathered those disordered conditions 

 characterized by the appearance or development locally of 

 adventitious and heterologous material, in connection with or 

 in place of the true dermal tissues. These changes and appear- 

 ances of new tissue are essentially distinct from hypertrophies, 

 or mere increase of already existing elements. At first, and in 



