XXIV.] SKIN AND TOUCH. 



f. The hair- bulb or the enlargement of the 

 hair in its deepest part, consisting of a 

 layer of nucleated cells continuous with 

 the outer root- sheath ; the outer root- 

 sheath near this point is much diminished 

 in breadth. 



77. The papilla of the follicle projecting into 

 the hair- bulb, it consists of connective 

 tissue like that of the outer layer of the 

 dermis with which it is continuous. 



Q. The substance of the hair consisting of 

 a cuticle of thin horny scales in a single 

 layer, and internally of long horny fibres 

 or in its deeper portion of spindle shaped 



cells. 



h. The sebaceous gland or glands opening 

 into the upper part of the hair follicle; in the 

 body of the gland the cells are several layers 

 deep ; they are continuous with the cells of 

 the outer root-sheath. 



i. A little below the opening of the gland into 

 the follicle may be seen a band of plain 

 muscular fibres, stretching obliquely from 

 the inner sheath of the follicle to the upper 

 part of the dermis. 



2. Cut sections of the palm of the hand or of the 

 forehead 1 , hardened in chromic acid, picric acid, 



1 Instead of this a piece of the skin of the ball of the foot of a cat 

 may be taken. 



