CONTENTS. 5 



XXXVI. The Proteids 161 



XXXVII. a. The diffusibility of Proteids 166 



b. Milk. 



XXXVIII. Gastric Digestion 171 



XXXIX. Gastric Digestion, Continued 177 



XL. Gastric Digestion, Continued 180 



XLI. The Properties of Fats 182 



XLII. Intestinal Digestion 186 



XLIII. Absorption 189 



F. Vision. 



XLIV. Dissection of the Appendages of the Eye. . 191 



XLV. Dissection of the Eyeball 195 



XLVI. Physiological Optics 198 



a. Determination of the Indices of Refrac- 

 tion of Water and of Glass. 



b. Determination of the Focal Distance of 

 Lenses. 



c. Verification of the formula: 7 hp^f- 



d. Problems. 



XLVI I. Physiological Optics, Applied 210 



a. The Application of the Laws of Refrac- 

 tion to the Normal Eye. "The Re- 

 duced Eye." 



b. To Locate, Experimentally, in the Mam- 

 malian Eye the Cardinal Points of the 

 Simple Dioptric System. 



XLVIII. a. Accommodation 216 



b. Convergence. 

 XLIX. Miscellaneous Experiments 222 



a. Scheiner's Experiment. 



b. Purkinje Sansom's Images. 



c. The Blind Spot. 



