CONTENTS OF THE APPENDIX. 



CHAPTER I. 



EXPERIMENTS MADE TO DETERMINE WHETHER LIGHT EXHIBITS ANY MAGNETIC ACTION. 



Character of the Sky in Virginia. Examination of Mr. Christie's Experiment. Needles not af- 

 fected by the Violet Rays. No Reaction between a Magnet or Voltaic Currents and Light Page 3 



CHAPTER II. 



ON THE TIDAL MOTIONS OP MOVABLE ELECTRIC CONDUCTORS. 



Description of the Phenomenon. T/ie Polar Wires act as Centres of Attraction. They produce 

 Tides. Cause of the Oscillations. Cause of the Spiral Motions 8 



CHAPTER III. 



ON THE INTERSTITIAL MOVEMENTS WHICH TAKE PLACE AMONG THE PARTICLES OP BODIES. 



Of the Mode of Passage of Liquids through Pores. Endosmosis. Percolation through Gum Lac, 

 Gold Leaf, Mica, etc. Slow Motions in the Parts of Solid Bodies, as in Silver Coins. Perco- 

 lation through India Rubber. Conditions of Equilibrium. Percolation through Masses of 

 Water. Percolation through excessively thin Films of Water, as Soap Bubbles. Analysis of 

 Gas on the Exterior and in the Interior of the Soap Bubble. General Law of the Phenomenon 

 deduced 13 



CHAPTER IV. 



ON INTERSTITIAL MOVEMENTS, being a Continuation of the preceding Chapter. 

 Diffusion takes place between the Particles of Heterogeneous Bodies. Differs from Chemical At- 

 traction. Action of Binary Arrangements. Action of Ternary Arrangements. Decompositions 

 by Binary Arrangements. Decompositions by Ternary Arrangements . . . .23 



CHAPTER V. 



THE PHYSICAL THEORY OF CAPILLARY ATTRACTION. 



Importance of Capillary Attraction in Physiology. Capillary Attraction is an Electrical Phenom- 

 enon. Its Physical Theory. The Effect varies with Variations of Electric Disturbance. Takes 

 place between Bodies of different Forms. Physiological Illustrations . , . .34 



CHAPTER VI. 



ON THE GREAT MECHANICAL FORCES GENERATED BY THE CAPILLARY ATTRACTION OF CELLULAR TISSUE. 



Physiological Relations of Cellular Tissue. Force with which Gases and Liquids pass through 

 Cellular Tissue. Disturbing Action of Leakage. The Capillary Force overcomes powerful 

 Mercurial Pressure. Dalton's Hypothesis. The Tissue is the Origin of the Force. Its Absorbent 

 and Condensing Action. Voltaic Batteries may be used for producing great Pressures. Gases 

 pass when resisted by the Force of many Atmospheres. The condensed Gas acts as a Vacuum. 

 Co-ordination of the Results of Dalton, Graham, and Mitchell. Disturbing Agencies. Disturb- 

 ance by Variation of Temperature. Physiological Experiments and Remarks . . .42 



