מה אומרים אנשים - כתיבת ביקורת
לא מצאנו ביקורות במקומות הרגילים
absorb According action Additional affinity alkalies ammonia animal appear atmospheric air attraction barytes base beautiful become bismuth blue bodies boiling called caloric carbonic acid charcoal chemical Chemistry cold colour combination combustion common composed compound contains converted copper crystals decomposed discovered dissolved Ditto earth effect employed experiment fire fluid formed give given glass gold grains heat hydrogen instance iron kind known lead light lime liquid magnesia manufacture matter means melted mercury metal method mineral mixed mixture muriatic muriatic acid native nature necessary Notes operation owing oxide oxygen oxygen gas phosphorus piece portion potass powder precipitate prepared present procured produced properties proportion pure quantity receiver render salts seen separate silver simple soda solid solution specific gravity substances sulphate sulphuric acid surface temperature tion various vegetable vessel weight whole
עמוד 344 - Full many a gem of purest ray serene The dark unfathom'd caves of ocean bear : Full many a flower is born to blush unseen, And waste its sweetness on the desert air. Some village- Hampden, that, with dauntless breast, The little tyrant of his fields withstood, Some mute inglorious Milton here may rest, Some Cromwell guiltless of his country's blood. Th...
עמוד 383 - Or hear'st thou rather pure ethereal stream, Whose fountain who shall tell ? before the sun, Before the heavens thou wert, and at the voice Of God, as with a mantle, didst invest The rising world of waters dark and deep, Won from the void and formless infinite.
עמוד 111 - Wide roams. the Russian exile. Nought around Strikes his sad eye, but deserts lost in snow; And heavy-loaded groves; and solid floods, That stretch athwart the solitary vast Their icy horrors to the frozen main; And cheerless towns far-distant, never bless'd, Save when its annual course the caravan Bends to the golden coast of rich Cathay *, With news of human kind.
עמוד 98 - Soon shall thy arm, unconquered steam, afar Drag the slow barge, or drive the rapid car ; Or on wide waving wings expanded bear The flying chariot through the fields of air...
עמוד 458 - ... in a state of intense activity ; and a platina wire, communicating with the positive side, was brought in contact with the upper surface of the alkali. The whole apparatus was in the open atmosphere.
עמוד 414 - And how well doth it execute its office! An anatomist, who understood the structure of the heart, might say beforehand that it would play; but he would expect, I think, from the complexity of its mechanism, and the delicacy of many of its parts, that it should always be liable to derangement, or that it would soon work itself out. Yet shall this wonderful machine go, night and day, for eighty years together, at the rate of a hundred thousand strokes every twenty-four hours, having, at every stroke,...
עמוד 446 - To enrich thy walls: but thou didst hew the floods, And make thy marble of the glassy wave.
עמוד 114 - That, ever busy, wheels the silent spheres; Works in the secret deep; shoots, steaming, thence The fair profusion that o'erspreads the Spring: Flings from the sun direct the flaming day; Feeds every creature ; hurls the tempest forth ; And, as on earth this grateful change revolves, With transport touches all the springs of life.
עמוד 448 - ... that hydrogen, the alkaline substances, the metals, and certain metallic oxides, are attracted by negatively electrified metallic surfaces, and repelled by positively electrified metallic surfaces ; and contrariwise, that oxygen and acid substances are attracted by positively electrified metallic surfaces, and repelled by negatively electrified metallic surfaces ; and these attractive and repulsive forces are sufficiently energetic to destroy or suspend the usual operation of elective affinity.
עמוד 71 - As home he goes beneath the joyous moon. Ye that keep watch in heaven, as earth asleep Unconscious lies, effuse your mildest beams, Ye Constellations, while your angels strike, Amid the spangled sky, the silver lyre. Great Source of day, best image here below Of thy Creator, ever pouring wide, From world to world, the vital ocean round, On Nature write with every beam his praise.