Elementary Physiography: An Introduction to the Study of NatureLongmans, Green & Company, 1899 - 427 σελίδες |
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Σελίδα 1
... stars ; the sky , the clouds , and the wind ; the sea , the shore , and the rocks ; the mountains , plains and valleys , plants and animals , are all comprised in the term " Nature " or " Natural Objects . " Even what are called ...
... stars ; the sky , the clouds , and the wind ; the sea , the shore , and the rocks ; the mountains , plains and valleys , plants and animals , are all comprised in the term " Nature " or " Natural Objects . " Even what are called ...
Σελίδα 193
... stars have been found to be visible at a height of 200 to 300 miles , and this could only be because they had become ignited owing to the friction caused by their rapid passage through the air . These meteors are compara- tively small ...
... stars have been found to be visible at a height of 200 to 300 miles , and this could only be because they had become ignited owing to the friction caused by their rapid passage through the air . These meteors are compara- tively small ...
Σελίδα 265
... stars . Snow consists of aqueous vapour solidified into icy particles , which cohere in regular symmetrical forms , having usually six rays or six sides . A number of such crystals usually cling together and fall as snow- flakes . They ...
... stars . Snow consists of aqueous vapour solidified into icy particles , which cohere in regular symmetrical forms , having usually six rays or six sides . A number of such crystals usually cling together and fall as snow- flakes . They ...
Σελίδα 311
... stars and other heavenly bodies appear to lie . With careful watching we may notice some of the stars rise above the eastern part of the horizon , ascend to their highest point in the south , and then descend to disappear below the ...
... stars and other heavenly bodies appear to lie . With careful watching we may notice some of the stars rise above the eastern part of the horizon , ascend to their highest point in the south , and then descend to disappear below the ...
Σελίδα 312
... Star . Stars that revolve round it without setting are called circumpolar stars . The seven stars seen on the right of the figure are such stars , and form part of a group known as the Great Bear . Two of the stars in this group are ...
... Star . Stars that revolve round it without setting are called circumpolar stars . The seven stars seen on the right of the figure are such stars , and form part of a group known as the Great Bear . Two of the stars in this group are ...
Συχνά εμφανιζόμενοι όροι και φράσεις
acid altitude angle Antarctic Antarctic Circle Arctic Arctic Circle Atlantic atmosphere axis barometer body calcium carbonate called carbon celestial equator celestial sphere centre circle coast currents declination delta density deposits depth distance earth earth's orbit east ecliptic equal equator equatorial equinox evaporation Experiment fall fathoms feet flask force glacier globe heat Hence horizon inches increase iron land latitude lava length liquid magnet mass mercury meridian miles moon motion mountain move needle night north pole Northern Hemisphere OCEAN oxide oxygen parallel particles passing plane position pressure quantity rain rays regions right ascension rise river rocks rotation round side sidereal day silica solar day specific gravity spring stars stream substance sun's surface temperature thermometer Tropic Tropic of Cancer Tropic of Capricorn tube valley vapour velocity vernal equinox vertical volcano weight winds winter zenith
Δημοφιλή αποσπάσματα
Σελίδα 20 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Σελίδα 37 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Σελίδα 313 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Σελίδα 415 - All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
Σελίδα 356 - The Ram, the Bull, the heavenly Twins, And next the Crab the Lion shines, The Virgin and the Scales ; The Scorpion, Archer and He-goat, The Man that holds the watering-pot And Fish with glittering tails.
Σελίδα 317 - The zenith distance of a body is its angular distance from the zenith, measured on the vertical circle passing through the body from 0° to 90°. It is the complement of the altitude.
Σελίδα 258 - When there is not enough of clouds and wind to afford this degree of protection, dew begins to form, and by preventing the temperature of any leaf or flower from sinking below the dew-point, saves them all from destruction, unless, as when hoar-frost appears, the dew-point itself is below the freezing-point.