LIST OF WOOD-ENGRAVINGS. 



1. Vegetable cells from a young shoot of Solarium tuberosam . .31 



2. Cartilage-cells from the margin of ossification of growing cartilage . . 32 



3. Different kinds of cells and cell-formations, a. Hepatic cell. b. Con- 



nective-tissue corpuscle, c. Capillary vessel, d. Stellate cell from a 

 lymphatic gland, e. Nerve-cell from the cerebellum . . . .36 



4. Formation of vegetable cells, according to Schleiden . . . .86 

 6. Pigment-cell (from the eye), smooth, muscular fibre-cell (from the intes- 

 tines), portion of a nerve-fibre with a double contour . . . .89 



6. Cartilage from the epiphysis of the humerus of a child . . . .41 



7. Cortical layer of a tuber of Solanum tuberosum 45 



8. Longitudinal section of a young shoot of Syringa . . . . .47 



9. Pathological proliferation of cartilage from a costal cartilage . . .48 



10. Young ova from the ovary of a frog 49 



11. Cells from catarrhal sputa (pus- and mucus-corpuscles, and a pigment- 



cell) . 49 



12. Diagram of the globular theory . 58 



13. Diagram of the investment- (cluster-) theory ... ... 68 



14. Cylindrical epithelium from the gall-bladder ... . 58 



15. Transitional epithelium from the urinary bladder . . . . . 59 



16. Perpendicular section through the surface of the skin of a toe (epidermis, 



rete Malpighii, papillae) 60 



17. Diagrammatic representation of a longitudinal section of a nail in normal 



and pathological conditions ......... 65 



18. A. Development of sweat-glands. B. Portion of the duct of a sweat- 



gland 68 



