Scientific Dialogues, Volume 1M. Carey, 1815 |
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Página 19
... suppose that this is what is meant by a division without end ? Father . Difficult as this may at first ap- pear , yet I think it very capable of proof . Can you conceive of a particle of matter so small as not to have an upper and under ...
... suppose that this is what is meant by a division without end ? Father . Difficult as this may at first ap- pear , yet I think it very capable of proof . Can you conceive of a particle of matter so small as not to have an upper and under ...
Página 42
... Suppose a ball , fired from a cannon , pass through 800 feet in a second of time ; and in the same time your bro- ther's arrow pass through 100 feet only , how much swifter does the cannon ball fly than the arrow ? Emma . Eight times ...
... Suppose a ball , fired from a cannon , pass through 800 feet in a second of time ; and in the same time your bro- ther's arrow pass through 100 feet only , how much swifter does the cannon ball fly than the arrow ? Emma . Eight times ...
Página 50
... Suppose you are reading at the distance of one foot from a candle , and that you receive a certain quantity of light on your book ; now if you remove to the distance of two feet from the candle , you will , by this law , receive four ...
... Suppose you are reading at the distance of one foot from a candle , and that you receive a certain quantity of light on your book ; now if you remove to the distance of two feet from the candle , you will , by this law , receive four ...
Página 52
... Suppose it were required to find the weight of a leaden ball , at the top of a mountain three miles high , which , on the surface of the earth weighs 20lb . If the semi - diameter of the earth be taken at 4000 ; then add to this the ...
... Suppose it were required to find the weight of a leaden ball , at the top of a mountain three miles high , which , on the surface of the earth weighs 20lb . If the semi - diameter of the earth be taken at 4000 ; then add to this the ...
Página 59
... suppose I had given you an example in which the number of se- conds had been fifty instead of five , the work would have taken you an hour or more to have performed it : whereas , by the rule which I am going to give , it might have ...
... suppose I had given you an example in which the number of se- conds had been fifty instead of five , the work would have taken you an hour or more to have performed it : whereas , by the rule which I am going to give , it might have ...
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...