112 TRICIIOLOGIA MAMMALIUM; 



2 H" f an inch; cortex, dark-colored and opaque; when treated with terebinthus, becomes 

 partially translucent, and a greatly interrupted dark coloring matter is then seen in the 

 centre of the filament. Transverse sections, viewed as opaque objects, show a dark sur- 

 fice, with a minute white central spot; disks, viewed as transparent objects, show a much 

 larger white, (or motley,) irregularly shaped centre, in which are perceived the ends of 

 fibrils and a dark central spot. 



Having removed the cortex, fibres of a pure white and lustrous are seen. These are 

 separable into fibrils, one of which measured the T ^J^ 7 of an inch. Direction, at an acute 

 angle; inclination, crisped, frizzled and spirally curled; diameter of the curl, T 3 7 of an 

 inch; apex, mostlj r abrupt, (artificial.) 



OF THE HAIR IN TINEA CAPITIS, OR FAVUS. Hair of Mary O'Donnett, aged five years, 

 supposed to be laboring under Tinea Capitis, or Favus. Length, about 2 inches ; shape, 

 oval; diameter of some, r ^ by ^| T of an inch, others ^-J-^ by -^y. The diameter of the 

 same filament sometimes varying in diameter the -g^ T part of an inch; color, sometimes 

 dark brown, at others horn-colored; no lustre; direction, at an acute angle; inclination, 

 stiffly bending at nearly a right angle.* (See fig. 80.) 

 Ductility, Elasticity and Tenacity. 



With 370 grains one inch stretched ft of an inch, elasticity entire. 

 570 " " " -? " " 



.. 720 " " " ^r " " 



" 770 " " ft 



" 820 " ft " minus ft 



" 87 " " -5H " " flV 



" 92 " U " A 



" 970 " " ^ "' ft 



" 1,120 " 3.4 " ,',;; 



TO" !i '" 



it 1 OOA - " " 3 'l '* 1 8 



IjOsSU ^^ ^-g- 



" 1,370 " |f " " f-g- 



" 1,420 " 



" 1,470 " broke. 



Fracture, abrupt ; button, mostly obliterated, leaving the end of the shaft crooked, rag- 

 ged and discolored, two buttons found sometimes adhering, enclosed in the same shaft ; sheath, 

 very much elongated and ragged, vessels adhering of the diameter of T5 Yo f an inch; 

 shaft, varying in diameter and color, bending abruptly when on the head, but expanding 

 when put into water; apices, all abrupt. 



Remarks. This pile is so completely diseased that the button and the inferior portion 

 of the shaft are destroyed. The shaft, bending at nearly a right angle, is an unfavorable 



* Resembling in this respect the pile of some of the species of animals who have the paved cortex. 



