APPENDIX. VU 



X. — Of the Teeth of Animals — their Mechanical provi- 



sions, 257. 



XI. — The Subject pursued, with reference to the Growth 



and Formation of Teeth, 270. 

 XII. — Of the Mouth, 276. 



XIII. — Of Hunger and Thirst, 284. 



XIV. — Stomach of the Horse, 287. 

 XV.— Of the Gizzard, 289. 



XVI. — On the Rays of Light, their Refraction and Reflec- 

 tion, 294. 

 XVII. — The Eye compared with Optical Instruments, 300. 

 XVIII. — Of the Means by which the Eye is protected, 308. 

 XIX. — Motions of the Eyeball and Eyelids, 315. 

 XX. — Muscles of the Eyelids, 322^ 

 iXXI. — Review of the Uses of the Parts in the Ear, 325 



XXII. — Of the Circulation, 330. 



XXIII. — Of the Veins, 343. 



XXIV. — On the Arteries, 349. 



XXV. — Microscopic Phenomena in the Animal Body — Mole- 

 cular Motions — Ciliary Motions, 356. 

 XXVI. — On Life, 363. 

 XXVII. — Illustration of the Works of a Watch, 373. 



ILLUSTRATIVE WOOD-CUTS. — VOL. II. 



1. Telescopic view of the sun, 17. 



2. Telescopic view of Saturn, Jupiter, Mars, and Venus, 20. 



3. Representation of the earth's orbit, 36. 



4. View of the comet of 18 1 1 , 44. 



5. Section of the root of a deer's horn, 199. 



6. Section of the thigh bone, 202. 



7. Support of a weight, 203. 



8. Section of a cylindrical bone, 205. 



9. Support of a weight, 206. 



10. Sutures of the skull, 212. 



11. The skull, 215. 



12. Parietal bones of the skull, 216. 



