HOW TO OBSERVE THE HEAYENS. 



Interesting Nature of the Subject. — Diurnal Rotation. — Circnmpolar Stars. — Ursa Major. — Forms 

 of the Constellations. — The Pointers. — The Pole-Star. — Cassiopeia. — Capella. — The Swan. — 

 Equatorial Constellations. — Orion. — Siiius, or the Dogstar. — Aldcbaran. — Procyon. — Auriga. — 

 Columba. — Herschel's Observations on Sirius. — Dr. Wollaston's (Observations. — Aspect of the 

 Heavens at different Seasons of the Year. — Uses of the Celestial Globe. — To ascertain the Aspect 

 of the Heavens on any Night — at any Hour. — Effect of the Telescope on Fixed Stars. — Relative 

 Brightness of the Stars. — Theory of refracting and reflecting Telescopes, as applied to the 

 Stars. — Manner in which Sir W. Herschel applied it. — Method of estimating the Brightness of 

 small Stars. — Method of observing variable Stars. — Double Stars. — Description of the Micrometer. 



