Popular scientific recreations, tr. and enlarged from 'Les récréations scientifiques'. |
Dentro del libro
Resultados 1-5 de 46
Página 13
... disc of silver - paper gummed to a plate . is placed at about the distance of a foot from the eyes of a person , slightly above the head , and the patient regards this object fixedly , and without interruption for twenty or thirty ...
... disc of silver - paper gummed to a plate . is placed at about the distance of a foot from the eyes of a person , slightly above the head , and the patient regards this object fixedly , and without interruption for twenty or thirty ...
Página 24
... disc on the upper surface of the piece of money , and then drop them simultaneously . The two objects now reach the ground at the same time , the paper , in contact with the halfpenny , being preserved from the action of the air . This ...
... disc on the upper surface of the piece of money , and then drop them simultaneously . The two objects now reach the ground at the same time , the paper , in contact with the halfpenny , being preserved from the action of the air . This ...
Página 27
... disc , D. The apparatus is terminated at its lower end by a small tray , C , on which one can put pieces of lead in variable quantities . It is then plunged into a glass filled with water . The pieces of lead on the tray , C , are added ...
... disc , D. The apparatus is terminated at its lower end by a small tray , C , on which one can put pieces of lead in variable quantities . It is then plunged into a glass filled with water . The pieces of lead on the tray , C , are added ...
Página 62
... disc of cardboard and a lamp - glass will be all that is required to show the upward pressure of liquids . I apply to the opening of the lamp- glass a round piece of cardboard , which I hold in place by means of a string ; the tube thus ...
... disc of cardboard and a lamp - glass will be all that is required to show the upward pressure of liquids . I apply to the opening of the lamp- glass a round piece of cardboard , which I hold in place by means of a string ; the tube thus ...
Página 63
... disc , as well as the pressure beneath , is now equal to the weight of a body of water having for its base the surface of the opening of the tube , its depth being the distance from the cardboard to the level of the water . Syringes ...
... disc , as well as the pressure beneath , is now equal to the weight of a body of water having for its base the surface of the opening of the tube , its depth being the distance from the cardboard to the level of the water . Syringes ...
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...