228o 



COSMOPOLITAN SKIN DISEASES 



ordinary iiiternal treatment hy hydrargyrum cum creta, gr. i., three 

 times daily, and give also in most cases several injections of salvarsan 

 or heosalvarsan. The technique of the salvarsan treatment has 

 been given in the chapter on Framboesia, p. 1560. We use also 

 injections of various preparations of mercury. A mixed mercury 

 and potassium iodide treatment is of advantage in some cases. 

 Natives are said by some authors to be extremely susceptible to 

 mercury, but in our experience this has been exaggerated. We 



Fig. 906, — Ulcer: Tertiary Fig. 907. — Ichthyosis in a 



Syphilis. Sinhalese Girl. , 



generally give them the same doses as to Europeans. Native 

 doctors give often mercury disguised in various ways. Decoctions 

 of various herbs are also administered. In Abyssinia and Erythraea 

 a decoction of a herb related to sarsaparilla and called ' usciva/ 

 is much used, according to Annarat one. 



Venereal Sores. — These are common in all races, biit are more 

 apt to take a phagedsenic character in the tropics. 



Balano-posthitis. — Every type of balano-posthitis is met with 

 in the tropics. 



