Ill I 



after birth with the shedding of the down] . ; !uoed 



<>n u: n growtli . In 



"MammaN the shedding of tin- old and | 



exhihits a certain perindieit y, \\hieh fa d- P the wa* 



and colder periods of ill-- \ear. Tln^:l.e\ .1- ; . -l-.p .1 -IM: iner and a 

 Nvint. ; ! \! , th.- .she.! need, 



although lex.* noticeaMy, 1>\ I In- tiin- 



The falling oil' of the hair i < &^ in the part 



iv-tini! on tin- papilla and calif.! tin- luil!.. Tl.- c.-ll mult i ; 



by m lii.ii tli. addition of new corneous substance takes 



plan-, n ases; the falling hair becomes detached from its m 



it> d''-p ,-nd luck- a- tlmu.L'li it won- shreds; i >till 



ivtaincd in tin- hair follicle l.y i' ^hoath, until it is 



forcibly removed or is crowded out by the supplement 



its |ilac.-. 

 Tlu- opinion- of invi-st iir.-itoi-s >till d!il' r .Mucrming the manner 



tit, An especial subject 



of controversy is tin- point whether the young hair is formed from 



an entirely ne\v papilla (STIKDA, I old one 



(I. \\<. it;, v. Ili-.Mi;'. ur whether hoth methods o.vir ( Ki I.IKER, 



UNNA). It seems to me that the tir-t \i.\v i- ilio correct one, and 

 that the sin Min; of the hair- is due to f t y of their papilla. 



])min c Lr this slowly occurring process of dege . perhapn 



heioreit begii, -titution is Initiated ly the <xvurrence . 



active cell -proliferation at a place in tho outer sheath of the root 

 which indeed consistfl ..f oellfl ri-li in protoplasm and by the 



formation of a ne\\ plur. which ^i Mo the derma 



from the l.ottoin of th.- fundament of the old hair. At the blind 

 [deep] end of this secandar there i- t hen developed from 



the derma a new papilla, UJM.]! ined the new hair and 



ide of and In-low the old one, in the ma' 

 ioosly <le-rril>.d. When it begins to increase in lengtl 



ol.l hair lying above it, crowds the latter out 

 of its sli. i 'il it falU oil', ai:d tinally itself takes the place 



of it. 



According to ti \votild !>; a certain simila 



lu-tween the >hed.linir f the ha: smuch as 



in both cases second: r .i.il processes, from which the new 



t.x.th- or liair pa[illa .irise from the primary fundan 



and inasmuch as the ne\\ BtrUCturei 1-y their growth displace the- 

 old 



