ILLUSTRATIONS. 



FIG. PAGE 



1. Microscope . . . . 18 



2. Diagram showing the principle of a compound microscope 20 



3. Box for imbedding tissues 28 



4. Laboratory microtome 33 



5. Minot automatic precision microtome 34 



6. Minot automatic rotary microtome 34 



7. Apparatus for cutting tissues frozen by carbon dioxid 37 



8. Movements in honing . .... 38 



9. Apparatus for making wax plates, used in reconstruction by Bern's method . . 56 



10. Diagram of cell (Huber) 59 



1 1 . Cylindric ciliated cells from the primitive kidney of Petroniyzon planeri ... 60 



12-26. Processes of mitotic cell- and nuclear division 65, 66 



27-29. Mitotic cell-division of fertilized whitefish eggs (Huber) 67 



30. Mitotic division of cells in testis of salamander (Benda and Guenther) ... 69 



31-36. Processof fertilization (Boveri) . 72, 73 



37. Pigment cell from the skin of the head of a pike 77 



38. Isolated cells of squamous epithelium (Huber) 82 



39. Surface view of squamous epithelium from skin of a frog 82 



40. Simple columnar epithelium from the small intestine of man (Huber) .... 83 



41. Pseudostratified columnar epithelium 83 



42. Stratified pavement epithelium . . 84 



43. Cross-section of stratified squamous epithelium from esophagus of man (Huber) 84 



44. Isolated transitional epithelial cells from bladder of man (Huber) 85 



45. Cross-section of transitional epithelium from the bladder of a young child (Huber) 85 



46. Stratified columnar epithelium 86 



47. Ciliated cells from bronchus of dog 86 



48. Cross-section of stratified ciliated columnar epithelium from trachea of rabbit 



(Huber) . . . . 86 



49. Goblet cells from bronchus of dog . . 87 



50. Mucus-secreting cell (goblet cell) (Huber) ... 87 



51. Simple tubular glands ... .... 88 



52. Excretory ducts and lumina of the secretory portion of a compound tubular 



gland . 89 



53. Lumina of the secreting portion of a reticulated tubular gland 89 



54. Glandular classification .... 90 



55. Mesothelium from pericardium of rabbit (Huber) 93 



56. Mesothelium from mesentary of rabbit (Huber) 93 



57. Mesothelium from peritoneum of frog ... 93 



58. Mesothelium covering posterior abdominal wall of frog (Huber) 94 



59. Endothelial cells from small artery of mesentery of rabbit (Huber) 94 



60. Mesenchymatous tissue from the subcutis of a duck embryo 97 



61. Development of the different types of connective tissue from the mesenchyma 



(Huber) 98 



62. White fibrils and bundles from teased preparation of a fresh tendon from tail of 



rat (Huber) 99 



62^. Elastic fibers from ligamentum nuchas of ox 99 



63. Reticular fibers from a thin section of a lymph-gland (Huber) IOI 



64. Reticular connective tissue from lymph-gland of man 102 



65. Areolar connective tissue from subcutaneous tissue of rat (Huber) 102 



66. Cell-spaces in the ground- substance of areolar connective tissue of young rat 



(Huber) 103 



67. Connective-tissue cells from pia mater of dog (Huber) . . . . 103 



68. Pigment cells found on the capsule of sympathetic ganglion of frog (Huber) . 103 



69. Leucocyte of frog with pseudopodia 104 



70. Fibrous connective tissue from great omentum of rabbit 105 



II 



