L^7 



CONTENTS. 



THE STELLAR UNIVERSE. 



PAGE 



CHAP. IY. 58. His discovery of binary stars. 59. Gravitation of 

 the stars. 60. Star moving round star. 61. Table of binary 

 stars. 62. Case of 7 Virginis. 63. System revolving round 

 system. PROPER MOTION OP STARS : 64. The sun not a fixed 

 centre. 65. Phenomena indicating its motion. 66. Direction of 

 the sun's motion. 67. Its velocity. 68. Its probable centre. 



THE FORM AND DIMENSIONS OP THE MASS OP STARS WHICH 



COMPOSE THE FIRMAMENT : 69. Distribution of the stars on the 

 firmament. 70. Galactic circle and poles. 71. Variation of 

 stellar density. 72. Struve's analysis ofvHerschel's observations. 



73. The milky way. 74. It consists of innumerable stars 



crowded together. 75. Probable form of the stratum of stars in 

 which the sun is placed 1 



CHAP. V. STELLAR CLUSTERS AND NEBULA : 76. The stars of the 

 firmament a stellar cluster. 77. Such clusters innumerable. 

 78. Their distribution on the firmament. 79. Their con- 

 stitution. 80. Their apparent and real forms. 81. Nebulae. 

 82. Double ^nebulae. 83. Planetary nebulae. 84. Annular 

 nebulae. 85. Spiral nebulae 17 



CHAP. VI. Spiral nebulae (continued). 86. Number of nebulae. 

 87. The Dumb-Bell nebulas as observed by Sir J. Herschel and 

 Lord Rosse. 88. Various nebulae figured by the same observers. 

 89. Large irregular nebulae. 90. Rich cluster in the Centaur. 

 91. The great nebula in Orion. 92. The great nebula in 

 Argo.-*- 93. Magellanic clouds 33 



COMMON THINGS MAN. 



CHAP. L 1. Physical condition of Man generally neglected. 2. The 

 brain the organ of intelligence, 3. General view of the nervous 

 system. 4. Structure of the brain. 5. The Facial Angle. 

 6. Its variation in different animals. 7. Recognised as an indica- 

 tion of intellectual power. 8. The advantages Man derives from 

 the form of his members. 9. Prehensile and locomotive members. 

 10. Structure of the hand 11. The bones of the arm and hand. 



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