Of mechanics and astronomyH.C. Carey & I. Lea, M'Carty & Davis, Kimber & Sharpless, Lydia R. Bailey, Benjamin &Thomas Kite, Bennett & Walton, Marot & Walter, and Anthony Finley, 1825 - Science |
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Page 48
... raised to c , at which point if a weight be hung , it will be found tha the line of direction falls out of the base , and therefore the body must fall . Emma . I think I now see the reason of the advice which you gave me , when we were ...
... raised to c , at which point if a weight be hung , it will be found tha the line of direction falls out of the base , and therefore the body must fall . Emma . I think I now see the reason of the advice which you gave me , when we were ...
Page 54
... raised a little above the plane ; the body will roll towards the elevated end of the rulers , and appear to ascend ; the parts of the cone that rest on the rulers growing smaller as they go over a large opening , and thus letting it ...
... raised a little above the plane ; the body will roll towards the elevated end of the rulers , and appear to ascend ; the parts of the cone that rest on the rulers growing smaller as they go over a large opening , and thus letting it ...
Page 76
... raise weights , move heavy bodies , and overcome resistances , which , with- out their assistance , could not be ... raise fifty pounds to a certain distance in one minute , and if by the help of machinery , you wish to raise 500 pounds ...
... raise weights , move heavy bodies , and overcome resistances , which , with- out their assistance , could not be ... raise fifty pounds to a certain distance in one minute , and if by the help of machinery , you wish to raise 500 pounds ...
Page 77
... raised to a certain height , it may be full as convenient to elevate them one by one , as to take the advan- tage of the mechanical powers in raising them all at once . Because , as we have shown , the same time will be necessary in ...
... raised to a certain height , it may be full as convenient to elevate them one by one , as to take the advan- tage of the mechanical powers in raising them all at once . Because , as we have shown , the same time will be necessary in ...
Page 79
... raise weights , while it is sup- ported at a point by a prop or fulcrum , on which , as the centre of motion , all the other parts turn . A B ( Plate III . Fig . 17. ) will represent a lever , and the point c the fulcrum or centre of ...
... raise weights , while it is sup- ported at a point by a prop or fulcrum , on which , as the centre of motion , all the other parts turn . A B ( Plate III . Fig . 17. ) will represent a lever , and the point c the fulcrum or centre of ...
Common terms and phrases
advantage gained angle appear astronomers attraction of cohesion attraction of gravitation axis ball body called centre of gravity centre of motion Charles clock consequently CONVERSATION days and nights degrees diameter distance diurnal motion earth ecliptic Emma Ephemeris equal equator explain Father feet figure fixed stars force fulcrum full moon globe greater heat heavens hemisphere hence Herschel horizon inch inclined plane inhabitants James journey Jupiter kind law of motion length less lever light line of direction marble Mars matter means mechanical powers Mercury millions of miles minutes moon's move multiplied nearer observe orbit papa philosophy planets polar circles poles pound pound weight principle proportion pulleys rays reason retrograde motion revolves rise rotation round the sun Saturn screw seen sidereal day solar system space passed sun's superior planets supposed surface tides tion turn Tutor velocity Venus visible wedge weight
Popular passages
Page 172 - Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung; Silence was pleas'd: 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.
Page 96 - To ask or search I blame thee not, for heaven Is as the book of God before thee set, Wherein to read his wondrous works, and learn His seasons, hours, or days, or months, or years.
Page 178 - 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.
Page 194 - On earth join all ye creatures to extol Him first, him last, him midst, and without end. Fairest of stars, last in the train of night, If better thou belong not to the dawn, Sure pledge of day, that crown'st the smiling morn With thy bright circlet, praise him in thy sphere, While day arises, that sweet hour of prime.
Page 160 - 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.
Page 51 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 158 - I do : twice only in the year, a line drawn' from the centre of the sun to that of the earth passes through those points where the equator and ecliptic cross one another; at all other times,- it passes through some other part of that oblique circle, which is represented on the globe by the ecliptic line. Now when it passes through the equator or the tropics, which are...
Page 194 - Lebanon's extended wood Was destin'd only for his walk and food ; The vilest cockle, gaping on the coast That rounds the ample seas, as well may boast The craggy rock projects above the sky, That he in safety at...
Page 191 - Even in the depth of polar night, they find A wondrous day; enough to light the chase, Or guide their daring steps to Finland fairs.
Page 220 - How distant some of these nocturnal suns ! So distant (says the sage) 'twere not absurd To doubt if beams, set out at Nature's birth, Are yet arrived at this so foreign world, Though nothing half so rapid as their flight.