CONTENTS. 



VI. PERPETUAL MOTION FALLACIES. 



PAGE 



1. Liquid Air and Perpetual Motion . . . .175 



2. The Inexhaustible Source of Heat . . . .178 



3. A Clock which is never wound and never stops . 181 



VII. MAGNETISM. 



Pulling without any Cord . ^ ' . . ." . 186 



PART III. 



CHEMICAL PARADOXES. 

 I. CURIOSITIES OF COMBINATION. 



1 . Fire a Source of Water : Picking Moisture out of a 



Hot Flame . . . * . '. . 201 



2. Water a Source of Fire. . ,,, * . . 204 



3. Paradoxes of Substance and Form . . . . 207 



II. DISINTEGRATION. 



1. The Philosopher's Stone . . . . . 210 



2. Disintegration in General -..-'. . . . 214 



PART IV. 



PHYSIOLOGICAL PARADOXES. 

 I. THE EYES, AND PECULIARITIES OF VISION. 



1. A Blind Spot in a Sound Eye . . . .216 



2. The Sane and Sober seeing double . . . .219 



3. Looking through the Hand .... ; 225 



4. Blue and Yellow not producing Green . . . 229 



5. Looking at One Colour and seeing Another . .231 



