VI CONTENTS. 



DIVISION II. 



Page 



VIII. On the Employment of Matiiemat[cal Modes 

 OF 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 op the Human 

 Knee-Joint ...... 220 



(Edinbxirgh Medical Journal, July 1855.) 



X. On the Mechanism op the Knee- Joint . .231 



(Abstract in Proceedings of Royal Society, Edinburgh, 

 January 18, 1858.) 



XL On the Curvatures and Movements of the 



Acting Facets of Articular Surfaces . 24 G 



XII. Lecture on the Eetina . . . .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 Jovirnal, December 1855.) 



XV. On the Electrical Apparatus in Torpedo, Gym- 



NOTus, Malapterurus, and Eaia . . 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.) 



