Vs " 



ENGRAVINGS ON STEEL. 



ERRATUM. 



ON page 490 reference is made to a Meteorological Map. 

 This map existed in former editions, but was for various 

 reasons omitted in the present one. The reference has, by 

 an awkward overlook, been allowed to stand. 



ENGRAVINGS ON WOOD. 



Page 

 BirsNimrood, ..... 1 



Portrait of Thalcs, ..... 6 



Portrait of Pythagoras, .... 8 



Aristarchus's Plan of Earth's distance from the Sun, 9 

 Eratosthenes's Plan of Earth's magnitude, . . 9 



Portrait of Ptolemy, . . . . 11 



System of Ptolemy, . . . . .12 



Mars and Jupiter's Circuits, ... 12 



System of Hipparchus, . . . . .13 



Ptolemy's Theory of Epicycles, ... 13 



Obelisk at Heliopolis, ..... 15 



Tail-piece, ...... 16 



Portraits of Copernicus, Keppler, and Galileo, . 17 



Initial Letter, 17 



Motions of the Planet?, . . . . .21 



Portrait of Tycho BraM, .... 22 



System of Tycho, 

 Earth's motion on its axis, , 

 Tycho Brahe's Observatory, 

 Refraction of the Atmosphere, 

 Uraniberg, or Castle of the Heavens, . 

 Unequal velocity of the Planets, 

 Portraits of Halley, Newton, and Herschel, 

 Initial Letter, . 



Velocity of Light, 

 Greenwich Observatory, 

 Newton's Birthplace, 

 Newton's Theory of Attractions, 

 Newton's Theory of Centrifugal Force, 

 Room in which Newton was born, . 

 Bailey's Tomb, .... 

 Aberration of the Stars, . . 



P-ge 



. 22 



23 

 . 24 



25 

 . 23 



27 

 . 33 



33 

 . 35 



3<5 

 . 33 



39 

 . 39 



40 



. 41 

 42,43 



