Popular scientific recreations, tr. and enlarged from 'Les récréations scientifiques'. |
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Página 4
... existence of Matter in one or other of these forms our Senses help us . We can touch a Solid , or taste it and see it . But touch is the test . We have said that Matter possesses certain properties . We will examine these briefly . The ...
... existence of Matter in one or other of these forms our Senses help us . We can touch a Solid , or taste it and see it . But touch is the test . We have said that Matter possesses certain properties . We will examine these briefly . The ...
Página 19
... existence of a luminous cross , which certain atmospheric conditions have rendered but partially visible . How often one sees along the roads little whirlwinds of dust raised by the wind accomplishing a rotatory movement , thus ...
... existence of a luminous cross , which certain atmospheric conditions have rendered but partially visible . How often one sees along the roads little whirlwinds of dust raised by the wind accomplishing a rotatory movement , thus ...
Página 133
... existence of impressions received by the retina can be made with the figure above ( 138 ) . If the gaze be fixed upon the dark spot in the centre of the white figure for about half a minute , and the eyes then directed to the ceiling ...
... existence of impressions received by the retina can be made with the figure above ( 138 ) . If the gaze be fixed upon the dark spot in the centre of the white figure for about half a minute , and the eyes then directed to the ceiling ...
Página 142
... existence . In like manner a human figure shadowed forth in a feeble twilight may undergo similar changes , and after being distinctly seen while it is in a situation favourable for receiving and reflecting light , it may suddenly ...
... existence . In like manner a human figure shadowed forth in a feeble twilight may undergo similar changes , and after being distinctly seen while it is in a situation favourable for receiving and reflecting light , it may suddenly ...
Página 144
... existence of terrestrial elements in celestial bodies has SPECTRUM ANALYSIS . 145 been discovered by means of preparing. Fig . 150. - The Spectroscope . Fig . 152. Converging rays to a focus . Fig. 144 SCIENTIFIC RECREATIONS .
... existence of terrestrial elements in celestial bodies has SPECTRUM ANALYSIS . 145 been discovered by means of preparing. Fig . 150. - The Spectroscope . Fig . 152. Converging rays to a focus . Fig. 144 SCIENTIFIC RECREATIONS .
Términos y frases comunes
acetic acid ammonia angles animals antimony apparatus appear atmosphere attraction axis ball balloon battery body called carbonic acid carpel cause cells centre chemical clouds colour combination compound contains copper crustacea crystals cylinder disc distance earth effect electricity equal experiment feet flowers fluid force give glass globe gravity heat hydrogen illustration fig infusoria instrument iron known lamp Leyden jar light lime liquid machine magnet means mercury metal miles minerals moon motion movement nature needle nitric acid nitrogen object observed obtained oxide oxygen paper particles pass perceived phenomena phosphorus piece pistil plants plate platinum pole portion position possess Praxinoscope pressure produced rays retina rocks rotation round salt seen silver sound specific gravity stamens stars substances sulphate sulphuric acid surface temperature termed tion tube turn vapour vegetable vibrations weight wheel wind wire zinc
Pasajes populares
Página 447 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Página 311 - There is a place for everything and everything is in its place.
Página 533 - He telleth the number of the stars, and calleth them all by their names.
Página 549 - There rolls the deep where grew the tree; Oh, Earth, what changes hast thou seen ! There, where the long street roars, has been The stillness of the central sea. The hills are shadows, and they flow From form to form, and nothing stands ; They melt like mists, the solid lands — Like clouds, they shape themselves and go...
Página 466 - ... 430 feet ; Mars, a rather large pin's head, on a circle of 654 feet ; Juno, Ceres, Vesta, and Pallas, grains of sand, in orbits of from...
Página 446 - 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...
Página 492 - Saw the moon rise from the water Rippling, rounding from the water, Saw the flecks and shadows on it, Whispered, "What is that, Nokomis?" And the good Nokomis answered : " Once a warrior, very angry, Seized his grandmother, and threw her Up into the sky at midnight; Right against the moon he threw her ; "Tis her body that you see there." Saw the rainbow in the heaven, In the eastern sky the rainbow, Whispered,
Página 630 - Her silver crescent tipped with sable clouds, Conclude she bodes a tempest on the main, And brews for fields impetuous floods of rain.
Página 593 - Tremble, thou earth, at the presence of the Lord ; at the presence of the God of Jacob ; 8 Who turned the hard rock into a standing water, and the flint-stone into a springing well.
Página 449 - The Axis OF THE EARTH is an imaginary line passing through the centre of it...