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 affected by the 

 Violet Rays. Xo Reaction between a Magnet or Voltaic Currents and Light . . . Page 3 



CHAPTER II. 



ON THE TIDAL MOTIONS OF MOVABLE ELECTRIC CONDUCTORS. 



Description of the Phenomenon. The 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 OF 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. Percolation 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 Panicles of Heterogeneous Bodies. Differs from Chemical Attraction. 

 Action of Binary Arrangements. Action of Ternary Arrangements. Decompositions by Binary Arrange- 

 ments. Decompositions by Ternary Arrangements ......... 23 



CHAPTER V. 



THE PHYSICAL THEORY OF CAPILLARY ATTRACTION. 



Importance of Capillary Attraction in Physiology. Capillary Attraction is an Electrical Phenomenon. 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. 

 ^ oltaic 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. Disturbance by Variation of Temperature. Physiological 

 Experiments and Remarks .............. 42 



CHAPTER VII. 



THE PHYSICAL THEORY OF ENDOSMOSIS. 



Relation of Endosmosis to Capillary Attraction. Cases of reported Decompositions. Can be produced by 

 Inorganic Masses, and therefore not due to Vitality. Water made to wet Mercury. Voltaic Battery con- 

 trols Capillary Attraction. Action of Inorganic Tissues. Water passes through excessively small Pores. 

 Hydraulic Currents. Deposites produced by Endosmotic Currents. Apparent Decomposition of Metal- 

 lic Salts by Membranes. True Theory of it. General Conclusion that Endosmosis is nothing more than 

 common Capillary Attraction, and never occasions true Decompositions ...... 57 



CHAPTER VIII. 



ON THE USE OF A SECONDARY WIRE AS A MEASURE OF THE RELATIVE TENSION OF ELECTRIC CURRENTS. 



Object of the Memoir. Action of a Secondary Wire. Description of the Torsion Galvanometer. Resist- 

 ance of the Secondary Wire under Variations of Tension Condition of the C'urrent never changes. 

 Tension rises with Length of Wire and with Distance of Plates. Relation between Quantity and Tension. 

 Theory of Tension of the Voltaic Battery. Known Methods of increasins Tension of Currents. General 

 Law. Case of Thermo. Electricity and Machine Electricity. Voltaic Spark before Contact in Vacuo 73 



