Scientific Dialogues, Volume 1M. Carey, 1815 |
No interior do livro
Resultados 1-5 de 45
Página 168
... night . Get a long narrow tube , the longer and narrower the better , provided its weight does not render it unmanageable : examine through it any one of the largest fixed stars ; which are called stars of the first magnitude , and you ...
... night . Get a long narrow tube , the longer and narrower the better , provided its weight does not render it unmanageable : examine through it any one of the largest fixed stars ; which are called stars of the first magnitude , and you ...
Página 168
... night . Get a long narrow tube , the longer and narrower the better , provided its weight does not render it unmanageable : examine through it any one of the largest fixed stars ; which are called stars of the first magnitude , and you ...
... night . Get a long narrow tube , the longer and narrower the better , provided its weight does not render it unmanageable : examine through it any one of the largest fixed stars ; which are called stars of the first magnitude , and you ...
Página 176
... night , if they have not changed their places . Tutor . They always keep the same position , with respect to each other , though their situation , with regard to the heavens , will be different at different seasons of the year , and in ...
... night , if they have not changed their places . Tutor . They always keep the same position , with respect to each other , though their situation , with regard to the heavens , will be different at different seasons of the year , and in ...
Página 177
... night , you will find it is called Regulus , or Cor Leonis , the Lion's heart . By this method you may quickly discover the names of all the principal stars , and afterwards with a little patience , you will easily distinguish the ...
... night , you will find it is called Regulus , or Cor Leonis , the Lion's heart . By this method you may quickly discover the names of all the principal stars , and afterwards with a little patience , you will easily distinguish the ...
Página 192
... night ; Sweetly inconstant in her varying flame , She changes still , another , yet the same ! Now in decrease , by slow degrees she shrouds Her fading lustre in a veil of clouds ; Now of increase , her gath'ring beams display A blaze ...
... night ; Sweetly inconstant in her varying flame , She changes still , another , yet the same ! Now in decrease , by slow degrees she shrouds Her fading lustre in a veil of clouds ; Now of increase , her gath'ring beams display A blaze ...
Palavras e frases frequentes
angle appear astronomers attraction of cohesion attraction of gravitation axis ball called centre of gravity centre of motion Charles clock consequently CONVERSATION days and nights degrees diameter distance diurnal motion earth eclipse Emma Ephemeris equal equator fall Father feet fixed stars force fulcrum full moon globe greater heat heavens hence Herschel horizon inch inclined plane James journey Jupiter kind law of motion length LENOX AND TILDEN lever light line of direction marble Mars matter means mechanical powers Mercury millions of miles minutes moon's move nearer observe orbit papa perpendicular planets Plate polar circles poles pound pound weight principle proportion PUBLIC LIBRARY ASTOR pulleys rays reason retrograde motion revolves rise rotation round the sun Saturn screw seen sidereal day solar space passed sun's superior planets supposed surface tides tion turn Tutor velocity Venus visible wedge weight YORK PUBLIC LIBRARY
Passagens conhecidas
Página 353 - From seeming evil still educing good, And better thence again, and better still, In infinite progression. But I lose Myself in Him, in light ineffable ! Come, then, expressive Silence, muse His praise.
Página 262 - evidence of things not seen," in the fulness of Divine grace ; and was profound on this, the greatest concern of human life, while unable even to comprehend how the " inclination of the earth's axis to the plane of its orbit" could be the cause of the change of the seasons.
Página 202 - Of thirty years, to Mercury, whose disk Can scarce be caught by philosophic eye, Lost in the near effulgence of thy blaze.
Página 201 - Prime cheerer, light! Of all material beings first, and best ! Efflux divine ! Nature's resplendent robe ! Without whose vesting beauty all were wrapt In unessential gloom ; and thou, O sun ! Soul of surrounding worlds, in whom best seen Shines out thy Maker...
Página 82 - There is no difficulty in this, for if while my cricket-ball is rolling along after Henry has struck it, I strike it again, it goes on with increased velocity, and that in proportion to the strength which I exert on the occasion ; whereas, if while it is rolling, I strike it back again, or give it a side blow, I change the direction of its course.
Página 288 - Less than archangel ruined, and the excess Of glory obscured ; as when the sun, new risen, Looks through the horizontal misty air Shorn of his beams, or from behind the moon, In dim eclipse, disastrous twilight sheds On half the nations, and with fear of change Perplexes monarchs.
Página 277 - Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung ; Silence was pleased : now glow'd the firmament With living sapphires ; Hesperus that led The starry host rode brightest, till the moon, Rising in clouded majesty, at length Apparent queen unveil'd her peerless light, And o'er the dark her silver mantle threw.
Página 85 - If the force with which it strikes the air below it, is equal to the weight of its body, then the re-action of the air upwards is likewise equal to it, and the bird being acted upon by two equal forces in contrary directions, will rest between them. If the force of the stroke is greater than its weight, the bird will rise with the difference of these two forces ; and if the stroke be less than its weight, then it will sink with the difference.
Página 9 - ... of the terms which he is obliged to use. Ignorance of the language in which any science is taught, is an insuperable bar to its being suddenly acquired ; besides a precise knowledge of the meaning of terms, we must have an instantaneous idea excited in our minds whenever they are repeated ; and, as this can be acquired only by practice, it is impossible that philosophical lectures can be of much service to those who are not familiarly acquainted with the technical language in which they are delivered...
Página 205 - Mercury completes his transient year, Glowing, refulgent, with reflected glare; Bright Venus occupies a wider way, The early harbinger of night and day ; More distant still our globe terraqueous turns, Nor chills intense, nor fiercely heated burns ; Around her rolls the lunar orb of light, Trailing her silver glories through the night. On the earth's orbit see the various signs, Mark where the sun, our year completing, shines ; First the bright Ram his languid ray improves ; Next glaring wat'ry thro...