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 |
Dentro del libro
Resultados 1-5 de 77
Página 46
... necessary for producing it . Every kind of work , which is to be performed by a machine , may be considered , abstractedly , as a retarding force ; the im- pulses of water and wind , which are employed as moving powers , act by means of ...
... necessary for producing it . Every kind of work , which is to be performed by a machine , may be considered , abstractedly , as a retarding force ; the im- pulses of water and wind , which are employed as moving powers , act by means of ...
Página 71
... necessary that the eye - glass should be concave , as is evident by referring to fig . 17 : in this a double convex gh is substituted instead of a concave one . The focus of the ob- ject - glass is at E , and the lens g h must be so ...
... necessary that the eye - glass should be concave , as is evident by referring to fig . 17 : in this a double convex gh is substituted instead of a concave one . The focus of the ob- ject - glass is at E , and the lens g h must be so ...
Página 76
... necessary definitions , the author demonstrates the va- rious laws of refraction and reflexion : -he then illustrates the rationale and effect of lenses of different figures ; and after having laid down the theory of the reflexion and ...
... necessary definitions , the author demonstrates the va- rious laws of refraction and reflexion : -he then illustrates the rationale and effect of lenses of different figures ; and after having laid down the theory of the reflexion and ...
Página 142
... necessary to the conveniencies and elegancies of life . The glass and porcelain manufacturers , the workers in metals , the dyer and bleacher , the tanner and soap - boiler , with many others , depend on chemistry for improvement in ...
... necessary to the conveniencies and elegancies of life . The glass and porcelain manufacturers , the workers in metals , the dyer and bleacher , the tanner and soap - boiler , with many others , depend on chemistry for improvement in ...
Página 148
... necessary to support combustion , and during the process , it combines with the combustible body . Many of the substan- ces , into the combination of which oxygen enters , are important agents in chemistry ; such are mineral acids , the ...
... necessary to support combustion , and during the process , it combines with the combustible body . Many of the substan- ces , into the combination of which oxygen enters , are important agents in chemistry ; such are mineral acids , the ...
Otras ediciones - Ver todas
Términos y frases comunes
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.