Popular scientific recreations, tr. and enlarged from 'Les récréations scientifiques'. |
Dentro del libro
Resultados 1-5 de 43
Página 86
... sulphur is called " Flowers of Sulphur , " and that of perchloride of mercury " Corrosive Sublim ate . " Distillation is a more useful process , or , at any rate , one more frequently employed , and is used to separate a volatile body ...
... sulphur is called " Flowers of Sulphur , " and that of perchloride of mercury " Corrosive Sublim ate . " Distillation is a more useful process , or , at any rate , one more frequently employed , and is used to separate a volatile body ...
Página 160
... sulphur had the property of absorbing light , and giving it out again when placed in the dark . A simple way to do this is to expose clean oyster - shells to a red heat for half an hour . When cold , the best pieces are picked out and ...
... sulphur had the property of absorbing light , and giving it out again when placed in the dark . A simple way to do this is to expose clean oyster - shells to a red heat for half an hour . When cold , the best pieces are picked out and ...
Página 202
... sulphur , etc. , are bad , or NON- CONDUCTORS . Metals are the best conductors we have , but trees , plants , liquids , and the bodies of animals , including men , are all good conductors of electricity . Dry air is a bad conductor ...
... sulphur , etc. , are bad , or NON- CONDUCTORS . Metals are the best conductors we have , but trees , plants , liquids , and the bodies of animals , including men , are all good conductors of electricity . Dry air is a bad conductor ...
Página 203
... Sulphur . It should be observed that the degree of value as a conductor or non- conductor depends somewhat upon the atmosphere . For instance , glass is an excellent insulator , or non - conductor , when dry , but when wet it changes to ...
... Sulphur . It should be observed that the degree of value as a conductor or non- conductor depends somewhat upon the atmosphere . For instance , glass is an excellent insulator , or non - conductor , when dry , but when wet it changes to ...
Página 211
... sulphur . INSULATING POWER . Dry chalk . Native carbonate of baryta . Lycopodium . Caoutchouc . Camphor . Silicious and argillaceous stones . Dry marble . Porcelain . Dry vegetables . Baked wood . Leather . Parchment . Dry paper . Hair ...
... sulphur . INSULATING POWER . Dry chalk . Native carbonate of baryta . Lycopodium . Caoutchouc . Camphor . Silicious and argillaceous stones . Dry marble . Porcelain . Dry vegetables . Baked wood . Leather . Parchment . Dry paper . Hair ...
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...