Systematic Education: Or Elementary Instruction in the Various Departments of Literature and Science; with Practical Rules for Studying Each Branch of Useful Knowledge, Τόμος 2Longman, Hurst, Rees, Orme, and Brown, 1815 |
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Αποτελέσματα 1 - 5 από τα 74.
Σελίδα 11
... passing over it . Pullies , though varied in their construc- tion , may be reduced to two kinds , viz . those that are fixed , and those that are moveable , or which rise and fall with the weight . A fixed pulley , as that shewn in fig ...
... passing over it . Pullies , though varied in their construc- tion , may be reduced to two kinds , viz . those that are fixed , and those that are moveable , or which rise and fall with the weight . A fixed pulley , as that shewn in fig ...
Σελίδα 12
... passes through in the case of two moveable pulleys it is four times , and so on ; and as the velocities are as the spaces passed through , the mo- menta of the power and weight , will in the cases above de- scribed , be equal ; that is ...
... passes through in the case of two moveable pulleys it is four times , and so on ; and as the velocities are as the spaces passed through , the mo- menta of the power and weight , will in the cases above de- scribed , be equal ; that is ...
Σελίδα 37
... pass by the edge into the lower part of the pipe . In the piston there is a valve , a , opening upwards , to allow the air and water from below it to ascend , and at the same time prevent either from descending . The pipe AB , usually ...
... pass by the edge into the lower part of the pipe . In the piston there is a valve , a , opening upwards , to allow the air and water from below it to ascend , and at the same time prevent either from descending . The pipe AB , usually ...
Σελίδα 41
... passes through the valve ; but as the piston is pushed down , the air cannot return , and is , therefore , forced through a valve at the bottom of the barrel , that allows it to pass into the receiver B , but prevents it from returning ...
... passes through the valve ; but as the piston is pushed down , the air cannot return , and is , therefore , forced through a valve at the bottom of the barrel , that allows it to pass into the receiver B , but prevents it from returning ...
Σελίδα 43
... pass through B ; and since by the nature of an ellipse AC ÷ CB ; AD + DB ; AE + EB , & c . are all equal to each other , the pulses propagated from A to C , D , E , & c . and thence to B , will arrive there at the same time , and concur ...
... pass through B ; and since by the nature of an ellipse AC ÷ CB ; AD + DB ; AE + EB , & c . are all equal to each other , the pulses propagated from A to C , D , E , & c . and thence to B , will arrive there at the same time , and concur ...
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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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 354 - the doing good to mankind, in obedience to the will of God, and for the sake of everlasting happiness.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.