Popular scientific recreations, tr. and enlarged from 'Les récréations scientifiques'. |
Dentro del libro
Resultados 1-5 de 88
Página 9
... iron ring , and firmly secured to a wooden handle . When this was plunged under the water and drawn quickly out again , it came back full of slime . In the midst of this muddy substance one generally succeeded in finding the hydrophilus ...
... iron ring , and firmly secured to a wooden handle . When this was plunged under the water and drawn quickly out again , it came back full of slime . In the midst of this muddy substance one generally succeeded in finding the hydrophilus ...
Página 27
... iron wires of larger diameter , firmly stretched , and the lever should be made of a piece of very resisting wood . One can also , by adaptation , find the exact value of the most trifling weights . By lengthening a very fine platinum ...
... iron wires of larger diameter , firmly stretched , and the lever should be made of a piece of very resisting wood . One can also , by adaptation , find the exact value of the most trifling weights . By lengthening a very fine platinum ...
Página 41
... iron rail would never be able to proceed but for friction , which gives the necessary purchase or grip to the wheel and rail in contact . No surface is perfectly smooth , for we must push a body upon the smoothest surface we possess ...
... iron rail would never be able to proceed but for friction , which gives the necessary purchase or grip to the wheel and rail in contact . No surface is perfectly smooth , for we must push a body upon the smoothest surface we possess ...
Página 56
... iron . It sinks by its own weight . The pressure of the air inside is suffi- cient to keep the water out . Air being easily compressed , it is always pumped in to keep the hollow iron " bell " full , and to supply the workmen . There ...
... iron . It sinks by its own weight . The pressure of the air inside is suffi- cient to keep the water out . Air being easily compressed , it is always pumped in to keep the hollow iron " bell " full , and to supply the workmen . There ...
Página 76
... iron chairs , and is encircled by a piece of wire , to which is suspended the weight of say five pounds . The wire penetrates slowly , and in about an hour's time has passed completely through the lump of ice , and the weight , with the ...
... iron chairs , and is encircled by a piece of wire , to which is suspended the weight of say five pounds . The wire penetrates slowly , and in about an hour's time has passed completely through the lump of ice , and the weight , with the ...
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...