Conversations on Natural Philosophy: In which the Elements of that Science are Familiarly Explained and Adapted to the Comprehension of Young Pupils
Lincoln & Edmands, 1829 - Astronomy - 252 pages
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angle angle of incidence appear astronomy atmosphere axis ball called camera obscura Caroline centre of gravity centrifugal force circle cohesive attraction concave mirror consequently convex mirror degrees diminished direction distance diurnal motion earth eclipse ecliptick effect Emily equal equator explain figure fixed stars focus force fulcrum geometry glass globe greater heat humour lens less lever liquids mechanical power mechanicks mercury meridian moon motion move Natural Philosophy nature object obliquely observe opaque body opticks orbit particles passes pendulum perpendicular planets plate poles pressure produced properties proportion pulley pump rays fall rays of light re-action reflected rays reflecting telescope refraction represents resistance retina revolve round right line rise round the sun shadow shines situated solar solid bodies sonorous body sound space specifick gravity sphere spring sun's rays suppose surface tides tion tube understand vapour velocity vibrations weight whilst wind zodiack
Page 94 - Now came still evening on, and twilight gray Had in her sober livery all things clad ; Silence accompanied ; for beast and bird, They to their grassy couch, these to their nests Were slunk, all but the wakeful nightingale ; She all night long her amorous descant sung...
Page iii - District Clerk's Office. BE IT REMEMBERED, that on the tenth day of August, AD 1829, in the fifty-fourth year of the Independence of the United States of America, JP Dabney, of the said district, has deposited in this office the title of a book, the right whereof he claims as author, in the words following, to wit...
Page iii - ON NATURAL PHILOSOPHY ; In which the Elements of that Science are familiarly explained, and adapted to the comprehension of Young Persons.
Page 98 - Their names are Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricornus, Aquarius, Pisces; the whole occupying a complete circle, or broad belt, in the heavens, called the Zodiac.
Page 73 - ... time that the axle describes a small one; therefore the power is increased in the same proportion as the circumference of the wheel is greater than that of the axle. If the velocity of the wheel...
Page 94 - Had in her sober livery all things clad; Silence accompanied, for beast and bird, They to their grassy couch, these to their nests, Were slunk, all but the wakeful nightingale; She all night long her amorous descant* sung; Silence was pleased: now glowed the firmament With living sapphires: Hesperus, that led The starry host, rode brightest, till the Moon, Rising in clouded majesty, at length Apparent queen unveiled her peerless light, And o'er the dark her silver mantle threw.
Page 222 - Thus the rainbow, which exhibits a series of colours so analogous to those of the spectrum, is formed by the refraction of the sun's rays in their passage through a shower of rain, every drop of which acts as a prism, in separating the coloured rays as they pass through it.
Page 106 - 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 90 - THE planets are distinguished into primary and secondary. Those which revolve immediately about the sun are called primary. Many of these are attended in their course by smaller planets, which revolve round them : these are called secondary planets, satellites, or moons. Such is our moon which accompanies the earth, and is carried with it round the sun. Emily. How then can you reconcile the motion of the secondary planets to the laws of gravitation ; for the sun is much larger than any of the primary...
Page 153 - Water then ascends in the form of vapour, and descends in that of rain, snow, or hail, all of which ultimately become water. Some of this falls into the various bodies of water on the surface of the globe, the remainder upon the land. Of the latter, part re-ascends in the form of vapour, part is absorbed by the roots of vegetables and part descends into the bowels of the earth, where it forms springs.