The practical astronomer, comprising illustrations of light and colours [&c.].1845 |
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Page vi
... effects it produces in the system of nature - in order to prepare the way for a clear understanding of the princi- ples on which optical instruments are constructed , and the effects they produce . As this , as well as every other ...
... effects it produces in the system of nature - in order to prepare the way for a clear understanding of the princi- ples on which optical instruments are constructed , and the effects they produce . As this , as well as every other ...
Page vii
... effects - An emblem of the Deity - Provision made for its universal diffusion page 1-7 . CHAPTER I. GENERAL PROPERTIES OF LIGHT . Interesting nature of this study - Different hypotheses which have been formed respecting the nature of ...
... effects - An emblem of the Deity - Provision made for its universal diffusion page 1-7 . CHAPTER I. GENERAL PROPERTIES OF LIGHT . Interesting nature of this study - Different hypotheses which have been formed respecting the nature of ...
Page viii
... effect on the heavenly bodies - On the twilight - Illustrated by figures page 41-53 . EXTRAORDINARY CASES OF ... effects of re- fraction - Reflections on the beneficent and diversified effects pro- duced by the law of refraction -It ...
... effect on the heavenly bodies - On the twilight - Illustrated by figures page 41-53 . EXTRAORDINARY CASES OF ... effects of re- fraction - Reflections on the beneficent and diversified effects pro- duced by the law of refraction -It ...
Page x
... INVENTION OF TELESCOPES . The telescope a noble instrument - Effects it produces - Whether known to the ancients - Friar Bacon's ideas respecting telescopes- First constructed in Holland - The invention claimed by different X CONTENTS .
... INVENTION OF TELESCOPES . The telescope a noble instrument - Effects it produces - Whether known to the ancients - Friar Bacon's ideas respecting telescopes- First constructed in Holland - The invention claimed by different X CONTENTS .
Page xiii
... effect it produces on double stars , & c . - Rogers ' achro- matic telescope on a new plan - Wilson's telescope , & c . page 269-283 . CHAPTER V. ON REFLECTING TELESCOPES . SECT . 1. - HISTORY OF THE INVENTION , AND A GENERAL ...
... effect it produces on double stars , & c . - Rogers ' achro- matic telescope on a new plan - Wilson's telescope , & c . page 269-283 . CHAPTER V. ON REFLECTING TELESCOPES . SECT . 1. - HISTORY OF THE INVENTION , AND A GENERAL ...
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Common terms and phrases
achromatic telescope adjusted altitude angle apparent magnitude appear astronomical atmosphere axis beautiful Camera Obscura candle celestial centre circle colours concave lens concave mirror construction converging convex lens crown glass dark degree direction distant objects distinctly Ditto Dollond double double stars earth effect equal exhibited experiments eye-glass eye-piece feet focal field of view figure flint glass fluid focal length Gregorian half heavens hole horizon image formed inches aperture inches diameter inches focal distance inches focus instrument invention Jupiter lenses likewise magnifying power magnitude metal minute moon motion nature nearly Newtonian telescope object-glass observed optical opticians parallel rays pass perceived piece placed planets polished position principle prism produced proportion radius rays of light reflecting telescopes reflector refraction represented Right Ascension satellites Saturn seen side solar space specula speculum stars sun's supposed surface tance teles terrestrial objects tion tube violet visible
Popular passages
Page 5 - Or hear'st thou rather pure ethereal stream, Whose fountain who shall tell? Before the sun, Before the heavens thou wert, and at the voice Of God, as with a mantle didst invest The rising world of waters dark and deep, Won from the void and formless infinite.
Page 158 - As the appearance of the bow that is in the cloud in the day of rain, so was the appearance of the brightness round about. This was the appearance of the likeness of the glory of the Lord.
Page 159 - And it shall come to pass, when I bring a cloud over the earth, that the bow shall be seen in the cloud: 15 and I will remember my covenant, which is between me and you and every living creature of all flesh; and the waters shall no more become a flood to destroy all flesh.
Page 182 - Besides, the Jews and other ancient nations as well as modern Europeans have adopted the division of the week into seven days, and have named them from the seven planets : now if we increase the number of the planets this whole system falls to the ground.
Page 180 - Oh, my dear Kepler," says Galileo, " how I wish that we could have one hearty laugh together. Here, at Padua, is the principal professor of philosophy, whom I have repeatedly and urgently requested to look at the moon and planets through my glass, which he pertinaciously refuses to do.
Page 158 - Look upon the rainbow, and praise him that made it; very beautiful it is in the brightness thereof. It compasseth the heaven about with a glorious circle, and the hands of the most High have bended it.
Page 109 - ... numberless series of pilasters, arches, castles well delineated, regular columns, lofty towers, superb palaces, with balconies and windows, extended alleys of trees, delightful plains with herds and flocks, armies of men on foot and horseback, and many other strange figures in their natural colors and proper actions, passing rapidly in succession along the surface of the sea, during the whole of the short period of time while the above-mentioned causes remain.
Page 222 - The magnifying power of a telescope of this construction is found by dividing the focal distance of the object-glass by the focal distance of the eye-glass. Thus, if the...
Page 181 - There are seven windows given to animals in the domicile of the head, through which the air is admitted to the tabernacle of the body, to enlighten, to warm and to nourish it. What are these parts of the microcosmos: Two nostrils, two eyes, two ears and a mouth.
Page 159 - ... while the Earth remaineth seed-time and harvest, and cold and heat, and summer and winter, and day and night shall not cease.