x CONTENTS 



V. LIGHT THE ETHER IN ITS RELATIONS 

 TO MATERIAL MOLECULES 



TAGS 



Sources of Light Reflection Refraction Scattering 

 Absorption How Colours are produced The Ether 

 made for the Illumination of the Universe The Finest 

 Test of Order in the Atoms and Molecules Does the 

 Finest Work 56 



VI. SOUND AND MUSIC 



Causes Media Waves Periodic Motions, Musical Non- 

 periodic, Noises Waves in Air, Water, Earth 

 Reflection Refraction Velocity Numbers of Waves 

 Length Vibrations of Strings Rods Plates Bells 

 Resonance 75 



VII. LIFE PROTOPLASM 



Protoplasm Its First Appearance Complex Construction 

 Environment Evolution from Elements Haeckel's 

 Carbon Theory Special Life Element . . . .94 



VIII. CELLS AND ORGANISATIONS 



Cells Their Construction, Multiplication, and Modification 

 Egg-Cells The Building up of Animal Forms Great- 

 ness of the Work Mind in it Wealth of Order in the 

 Cells 109 



IX. THE PERCEIVING AND PERCEIVED 

 NATURES 



The Senses The Brain The Elements in it A Special Ele- 

 mentUnion to the Brain, Perfect, Stable, of Unlike 

 Natures Correspondences in Perception ; Many, Varied 

 Power of the Perceiving Nature Many such Natures- 

 Sensations caused by Numbered Motions . . .124 



