ADDITIONS TO THE REVISED EDITION OF 1880. 

 3. P. 507. 



525 



The microscope shows that the favus bodies consist of an epider- 

 mis coating, containing fungi and fine granular cement. From the 

 surface of the capsule numerous fungous filaments project into the 

 favus body. At first these filaments are simple, but deeper they 

 become branched and finally form chains. The same fungous ele- 

 ments are found in the roots of the hairs and in the hairs themselves. 



4. P. 509. 



We should not confound herpes ton dens capillitii with the dis- 

 ease known as alopecia areata. In the latter, which occurs both in 

 children and adults, the hair falls from a circumscribed spot in the 

 midst of a luxuriant growth, leaving circular bald spots, which may 

 unite with other similar spots. But alopecia areata is not due to 

 fungi ; it is a trophic nervous affection. The bald spot is not red 

 or covered with scales, and after some months the hair grows again 

 without treatment. 



Herpes tondens might be mistaken for roseola syphilitica or pso- 

 riasis ; but in the syphilitic affection there is no scaly deposit ; in 

 psoriasis, on the contrary, the red spots are covered with thick regu- 

 lar scales. 



5. P. 515. 



A treatment for scabies, recently again resorted to and highly 

 spoken of, is with balsam of Peru, which when brought in direct 

 contact is said to kill the insect in 20 to 40 minutes. The patient is 

 to have a warm bath, then to rub the whole body except the head, 

 but more especially the parts most affected, viz., the hands, feet, 

 large joints, penis, scrotum, breasts, and nates. The treatment 

 requires about one ounce of balsam, which may be used in four to 

 six applications, made within two days and without changing the 

 underclothes ; then wash the body well. This treatment has the ad- 

 vantage of not inflaming the skin or being so disagreeable as most 

 others. A similar but somewhat less expensive treatment is by 

 using petroleum 30 parts, olive oil 8 parts, in the same manner. 



