JOURNAL OP MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATES I & 11. 



Illustrating Dr. Thin's Memoir on the Structure of Hyaline 



Cartilage. 



(All the figures have been drawn as seen magnified by Hartnack's 

 obj. 8, ocular 3 ; tube out.) 



Fig. 1. — (a) Cells on the surface of the head of tiie femur of frog. (Nitrate 

 of silver.) {//) Individual cells in which the outlines of the nucleus were 

 distinct. 



Fig. 2. — Part of a layer of cells isolated from the cartilage of the head 

 of the frog's femur by solution of potash. 



Fig. 3. — Cells lying on cartilage of head of frog's femur. (Solution of 

 potash.) The cartUage-substance is not shown. The preparation showed 

 convex and concave surfaces on which the cells were applied. An inter- 

 epithelial substance is shown. 



Fig. 4. — Part of a layer of cells from one of the tracheo-laryngeal 

 cartilages of the frog. (Solution of potash.) 



Fig. 5. — Parr, of a surface from the cartilage of the head of frog's femur 

 covered with cells similar to those shown in the drawing. (Solution of 

 potash.) 



Fig. 6. — Transverse section through the condyle of a frog's femur. 

 Nitrate of silver. (The whole of the epithelial surface seen is not drawn.) 



Fig. 7. — Transverse section of cartilage from knee of a frog that died. 

 (Nitrate of silver.) 



Fig. 8. — Deposit of silver in the substance of a thick section from the 

 head of a frog's femur which was rubbed over with lunar caustic. 



Fig. 9. — Section through condyle of femur of a young rabbit, near the 

 bone. Silver preparation. Deposit in centre of framework. 



Fig. 10. — Section through condyle of femur of a young rabbit. Silver 

 preparation. The white spaces are on the surface of the section. 



Fig. 11. — Section through condyle of femur of one-day-old kitten. Silver 

 preparation. Unstained surface continuous with several " spaces." 



Fig. 12. — Tracheo-laryngeal cartilage of frog rubbed over with lunar 

 caustic. t 



Fig. 13. — Section tlirough condyle of femur of frog. Irritation of arti- 

 cular surfaces for seven days. Condyle was three days in :|-per-cent. 

 solution of osraic acid. 



Fig. 14. — Section from condyle of femur of one-day-old kitten. Surface 

 of cartilage rubbed over with lunar caustic. 



Fig. 15. — Transverse section of cartilage of carpus of sheep sealed in 

 aqueous humour. 



Fig. 16. — Cells isolated in aqueous humour from sealed section of car- 

 tilage of carpus of sheep. 



Fig. 17.— Cells seen in substance of sclerotic of frog sealed in aqueous 

 humour. 



Fig. 18. — " Giant cell " (disintegrated membranous substance) from 

 section of cartilage of carpus of sheep after being seven months sealed 

 in aqueous humour. 



Fig. 19. — Isolated cylinder ( = primary bundle of the author) from car- 

 tilage of head of frog's femur. In blood-serum. 



Fig. 20.— Cells with processes seen in oblique edge of section of car- 

 tilage of carpus of sheep sealed in aqueous humour. 



