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Page 7 - ELEMENTS OF ASTRONOMY: Accompanied with numerous Illustrations, a Colored Representation of the Solar, Stellar, and Nebular Spectra, and Celestial Charts of the Northern and the Southern Hemisphere. By J. NORMAN LOCKYER.
Page 7 - The volume is as practical as possible. To aid the student in identifying the stars and constellations, the fine Celestial Charts of Arago, which answer all the purposes of a costly Atlas of the Heavens, are appended to the work — this being the only text-book, as far as the Publishers are aware, that possesses this great advantage. Directions are given for finding the most interesting objects in the heavens at certain hours on different evenings throughout the year. Every device...
Page 7 - To aid the student in identifying the stars and constellations, the fine Celestial Charts of Arago, which answer all the purposes of a costly Atlas of the Heavens, are appended to the work — this being the only text-book, as far as the Publishers are aware, that possesses this great advantage. Directions are given for finding the most interesting objects in the heavens at certain hours on different evenings throughout the year. Every device is used to make the study interesting; and the Publishers...
Page 109 - They are only partiticular instances of the fundamental law of electric action, that bodies charged with the same kind of electricity repel one another.
Page 72 - ... then heat the ball, — the force of the expansion would be great enough to burst the ball. In large iron and tubular bridges allowance must be made so that the iron has room to expand ; for in the middle of summer the bridge will be somewhat longer than in the middle of winter, and if it has not room to lengthen out, it will be injured by the force tending to expand it. There is an arrangement for this purpose in the Menai Tubular Bridge. We take advantage of the force of expansion and contraction...
Page 58 - ... feet. By a most unlucky coincidence, the precise focus of divergence at the former station was chosen for the place of the confessional. Secrets never intended for the public ear thus became known, to the dismay of the confessors and the scandal of the people, by...