Systematic Education: Or Elementary Instruction in the Various Departments of Literature and Science; with Practical Rules for Studying Each Branch of Useful Knowledge, Volumen2Longman, Hurst, Rees, Orme, and Brown, 1815 |
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Página 5
... light to our eyes ; and that which , by its transparency , is always invisible ; such is the atmospheric air , with which we , and all terrestrial bodies , are perpetually surrounded , and such are the chemical gases , hereafter to be ...
... light to our eyes ; and that which , by its transparency , is always invisible ; such is the atmospheric air , with which we , and all terrestrial bodies , are perpetually surrounded , and such are the chemical gases , hereafter to be ...
Página 43
... light , in such small distances , may be considered as instantaneous , the dis- tance of the vessel may be considered at 5 × 1,142 , or 8 × 1,142 or 12 x 1,142 feet from the observer . When ærial waves meet with an obstacle which is ...
... light , in such small distances , may be considered as instantaneous , the dis- tance of the vessel may be considered at 5 × 1,142 , or 8 × 1,142 or 12 x 1,142 feet from the observer . When ærial waves meet with an obstacle which is ...
Página 49
... light- Reflexion of light - Different refrangibility of the rays of light - The Rainbow - Vision and structure of the Eye - Optical Instruments- Microscopes Telescopes - Camera Obscura - Magic Lantern - Phan- tasmagoria - Writers on ...
... light- Reflexion of light - Different refrangibility of the rays of light - The Rainbow - Vision and structure of the Eye - Optical Instruments- Microscopes Telescopes - Camera Obscura - Magic Lantern - Phan- tasmagoria - Writers on ...
Página 50
... Light . It is generally agreed , though the subject does not admit of demonstration , that light consists of inconceivably small particles , flowing with amazing velocity , in all directions , from the luminous or radiant body . This ...
... Light . It is generally agreed , though the subject does not admit of demonstration , that light consists of inconceivably small particles , flowing with amazing velocity , in all directions , from the luminous or radiant body . This ...
Página 51
... light must take years even to travel to the earth ; and it has been conjectured by some philosophers , that there are stars so remotely situated with respect to the solar system , that the light flowing from them , ever since the ...
... light must take years even to travel to the earth ; and it has been conjectured by some philosophers , that there are stars so remotely situated with respect to the solar system , that the light flowing from them , ever since the ...
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acid Adam Smith affections agriculture alkalies ammonia Amphibia animals appear association attention become benevolence body bones called capital circumstances colour commerce common complex connected connexion consequences consists convex lens degree denominated derived direction dispositions earth ecliptic electricity employed excite exercise external feelings fluid genus glass habit happiness Hence human important increase individual influence instance kind labour laws manufactures means mental mental philosophy mind moon moral motion motive muscles nations Natural Philosophy nature nitric acid object obligation observed operations oxydes oxygen pains persons Philosophy planets pleasures population potash principles produce properties proportion proposition quadrupeds rays readers referred regard respect retina rule of duty sensation sense sensible shew simple ideas Sophisms species specific gravity substances sulphuric acid supposed surface syllogism term thought tion truth tube understanding vessel virtue wealth Wealth of Nations whole words writers
Pasajes populares
Página 441 - THE annual labour of every nation is the fund which originally supplies it with all the necessaries and conveniences of life which it annually consumes, and which consist always either in the immediate produce of that labour, or in what is purchased with that produce from other nations.
Página 354 - the doing good to mankind, in obedience to the will of God, and for the sake of everlasting happiness.
Página 478 - It is in this manner that money has become in all civilized nations the universal instrument of commerce, by the intervention of which goods of all kinds are bought and sold, or exchanged for one another.
Página 97 - When any substance was introduced into this arch, it instantly became ignited ; platina melted as readily in it as wax in the flame of a common candle ; quartz, the sapphire, magnesia, lime, all entered into fusion...
Página 492 - Taking the whole earth, instead of this island, emigration would, of course, be excluded; and, supposing the present population equal to a thousand millions, the human species would increase as the numbers 1, 2, 4, 8, 16, 32, 64, 128, 256, and subsistence as 1, 2, 3, 4, 5, 6, 7, 8, 9. In two centuries the population would be to the means of subsistence as 256 to 9; in three centuries as 4096 to 13, and in two thousand years the difference would be almost incalculable.
Página 321 - MORAL Philosophy, Morality, Ethics, Casuistry, Natural Law, mean all the same thing ; namely, that science which teaches men their duty and the reasons of it.
Página 113 - Aries the Ram, Taurus the Bull, Gemini the Twins, Cancer the Crab, Leo the Lion, Virgo the Virgin, Libra the Balance, Scorpio the Scorpion, Sagittarius the Archer, Capricornus the Goat, Aquarius the Waterbearer, and Pisces the Fishes...
Página 495 - I should propose a regulation to be made, declaring that no child born from any marriage taking place after the expiration of a year from the date of the law, and no illegitimate child born two years from the same date, should ever be entitled to parish assistance.
Página 489 - It is in this manner that the demand for men, like that for any other commodity, necessarily regulates the production of men, quickens it when it goes on too slowly, and stops it when it advances too fast.
Página 475 - Labour was the first price, the original purchase-money that was paid for all things. It was not by gold or by silver, but by labour, that all the wealth of the world was originally purchased ; and its value, to those who possess it, and who want to exchange it for some new productions, is precisely equal to the quantity of labour which it can enable them to purchase or command.