A WHIRLING SPIRAL NEBULA, TYPICAL OF THAT FROM WHICH
THE SUN AND PLANETS WERE PROBABLY EVOLVED _Frontispiece_
MAP SHOWING THE CONSTELLATIONS OF THE ZODIAC AND THE
LINE OF THE ECLIPTIC RUNNING THROUGH THEM _Facing p._ 76
THE LOVELY CRESCENT THAT VENUS SHOWS WHEN TO OUR VIEW
SHE IS AT HER GREATEST BRILLIANCY " 136
RELATIVE APPARENT SIZE OF VENUS AT DIFFERENT PHASES
OF ILLUMINATION _Page_ 137