VI CONTENTS. 



DIVISION II. 



PAGE 



VIII. ON THE EMPLOYMENT OP MATHEMATICAL MODES 

 OP INVESTIGATION IN THE DETERMINATION OF 

 ORGANIC FORMS ..... 205 



(Daily Mail, July and August 1849.) 



IX. ON THE HORIZONTAL CURVATURE OF THE INTERNAL 

 FEMORAL CONDYLE; ON THE MOVEMENTS AND 

 RELATIONS OF THE PATELLA, SEMILUNAR CARTI- 

 LAGES, AND SYNOVIAL PADS OF THE HUMAN 

 KNEE-JOINT . . . . . 220 



(Edinburgh Medical Journal, July 1855.) 



X. ON THE MECHANISM OP THE KNEE-JOINT . . 231 



(Abstract in Proceedings of Royal Society, Edinburgh, 

 January 18, 1858.) 



XI. ON THE CURVATURES AND MOVEMENTS OF THE 



ACTING FACETS OP ARTICULAR SURFACES . 246 



XII. LECTURE ON THE RETINA . . . .265 



(Edinburgh Medical Journal, October 1855.) 



XIII. ON THE MODE IN WHICH LIGHT ACTS ON THE ULTI- 



MATE NERVOUS STRUCTURES OF THE EYE, AND 

 ON THE RELATIONS BETWEEN SIMPLE AND COM- 

 POUND EYES ..... 273 



(Proceedings of Royal Society, Edinburgh, April 6, 1857.) 



XIV. LECTURE ON THE LAMINA SPIRALIS OF THE COCHLEA 282 



(Edinburgh Medical Journal, December 1855,) 



XV. ON THE ELECTRICAL APPARATUS IN TORPEDO, GYM- 



NOTUS, MALAPTERURUS, AND RAIA . . 289 



(Edinburgh Medical Journal, August and September 1855.) 



XVI. A BRIEF REVIEW OF THE PRESENT STATE OF OR- 

 GANIC ELECTRICITY ..... 306 



(Edinburgh Philosophical Journal, October 1855.) 



