76 PRACTICAL MICROSCOPY. 



(The arteries in transverse section are plainly indicated by their 

 prominent media, the appearance of the fenestrated membrane as a 

 wavy yellowish line, and by the elliptical or circular outline. The 

 veins are smaller, with thinner walls, and their outline is generally 

 irregular. The smaller veins are commonly overlooked, on account 

 of their lumen having become obliterated by contraction of the tissue 

 in hardening.) 



6. Coils and ducts of sweat glands in last region. (The 

 tubes are cut in various directions, and the whole is surrounded by 

 dense fibrous tissue, forming a kind of capsule.) 



7. The collections of adipose tissue beneath the last region. 

 (The septa are dense and strong.) 



8. (Having selected a vertical section of a hair follicle:) (a) The 

 root of the contained hair, (b) The bulb and the hair pa- 

 pilla, (c) The medulla of the hair, (d) The root-sheath pro- 

 longed from the rete mucosum. (e) The fibrous (outer) sheath. 



9. The sebaceous glands. (The demonstration of the connection 

 between the neck of the gland and the follicle will require a very 

 favorable section.) 



10. (Scattered through thecorium and upper subcutaneous region:) 

 (a) Small portions of sebaceous glands, (b) Ducts of sudor- 

 iferous glands, (c) Oblique sections at various angles of hair 

 follicles (d) Small vessels. 



11. Arrector pili muscle. (Nearly always to be found standing 

 obliquely to the divided hair follicle. ) 



(H.)* 



12. (If demonstrable :) (a) The stratum lucidum. (b) Stratum 

 granulosum. 



13. The elongate cells of the rete, next the corium. 



14. (Where the tissue has been torn :) The impacted cells of the 

 horny epidermis. 



15. The basement membrane covering the corium. 



16. Capillaries of the papillae of the corium. (These may be 

 distinguished, when seen longitudinally, by tortuous lines of elongate 

 and deeply stained nuclei belonging to the endothelium. Arterioles 

 may be differentiated by their long muscle cells, the circular fibres 

 lying transversely to the vessel. ) 



17. The root-sheath of the hair follicles. (The cells composing 

 the root-sheath vary in appearance, according to their position rela- 



* Hign power, i. e., from three to four hundred diameters. 



