Fragments of science for unscientific peopleD. Appleton, 1875 - 422 páginas |
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Página 10
... mechanical properties . It is almost infinitely more attenuated than any known gas , but its properties are those of a solid rather than of a gas . It resembles jelly rather than air . A body thus constituted may have its boundaries ...
... mechanical properties . It is almost infinitely more attenuated than any known gas , but its properties are those of a solid rather than of a gas . It resembles jelly rather than air . A body thus constituted may have its boundaries ...
Página 15
... mechanical quality , if I may use the term , as that of grav- ity itself . Its intensity might be measured in the same way , namely , by the amount of motion which it can impart in a certain time . Thus the attraction of gravity at the ...
... mechanical quality , if I may use the term , as that of grav- ity itself . Its intensity might be measured in the same way , namely , by the amount of motion which it can impart in a certain time . Thus the attraction of gravity at the ...
Página 20
... mechanical effect . " If , for example , we point a cannon upward , and start a ball with twice the velocity imparted by a second cannon , the ball will rise to four times the height . The speedier ball , if directed against a target ...
... mechanical effect . " If , for example , we point a cannon upward , and start a ball with twice the velocity imparted by a second cannon , the ball will rise to four times the height . The speedier ball , if directed against a target ...
Página 21
... mechanical equivalent of heat . Now , a body falling from a height of 772 feet , has , upon striking the earth , a velocity of 223 feet a second ; and if this velocity were imparted to a body , by any other means , the quantity of heat ...
... mechanical equivalent of heat . Now , a body falling from a height of 772 feet , has , upon striking the earth , a velocity of 223 feet a second ; and if this velocity were imparted to a body , by any other means , the quantity of heat ...
Página 24
... mechanical value of the ten- sions and vires vivæ of the material universe is a constant quantity . The universe , in short , possesses two kinds of property which are mutually convertible , at an unvarying rate . The diminution of ...
... mechanical value of the ten- sions and vires vivæ of the material universe is a constant quantity . The universe , in short , possesses two kinds of property which are mutually convertible , at an unvarying rate . The diminution of ...
Palavras e frases frequentes
absorbed absorption Acetic ether action angle aqueous vapor atmosphere atoms attraction blue body called carbonic acid cause chemical chemical affinity cleavage cloud color crystal dark rays diamagnetic direction disease distance earth effect emitted energy experiment experimental tube fact Faraday flame flask floating matter force gases germs glass gravity hydrogen imagination intellectual invisible rays iron John Herschel JOHN TYNDALL liquid magnet mass Matterhorn mechanical ment microscope mind miracles molecular molecules motion Mozley Nature needle nerve Nicol nitrite of amyl observed optic optic nerve oxygen particles pass Pasteur pébrine perfectly phenomena philosopher physical planet platinum polarization pole possess present prism produced quantity question radiant heat radiation regards render repulsion result retina scientific solar space spectrum substance surface temperature things thought tion ultra-red velocity vibrations vis viva visible viva wire
Passagens conhecidas
Página 411 - XVIII. The Nature of Light: With a General Account of Physical Optics.
Página 318 - Fame is the spur that the clear spirit doth raise (That last infirmity of noble mind) To scorn delights and live laborious days; But the fair guerdon when we hope to find, And think to burst out into sudden blaze, Comes the blind Fury with th' abhorred shears, And slits the thin-spun life. 'But not the praise...
Página 416 - Our Place among Infinities: A Series of Essays contrasting our Little Abode in Space and Time with the Infinities Around us. Crown 8vo, cloth extra, 6s. The Expanse of Heaven : A Series of Essays on the Wonders of the Firmament.
Página 108 - ... the passage from the physics of the brain to the corresponding facts of consciousness is unthinkable. Granted that a definite thought and a definite molecular action in the brain occur simultaneously, we do not possess the intellectual organ, nor, apparently, any rudiment of the organ, which would enable us to pass by a process of reasoning from the one phenomenon to the other. They appear together, but we do not know why.
Página xvi - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
Página 114 - Was war' ein Gott, der nur von aussen stiesse, Im Kreis das All am Finger laufen liesse ! Ihm ziemt's, die Welt im Innern zu bewegen, Natur in Sich, Sich in Natur zu hegen, So dass, was in Ihm lebt und webt und ist, Nie Seine Kraft, nie Seinen Geist vermisst.
Página 108 - I do not think he is entitled to say that his molecular groupings and his molecular motions explain everything. In reality they explain nothing. The utmost he can affirm is the association of two classes of phenomena, of whose real bond of union he is in absolute ignorance. The problem of the connection of body and soul is as insoluble in its modern form as it was in the pre-scientific ages.
Página 84 - Self-reverence, self-knowledge, self-control, These three alone lead life to sovereign power. Yet not for power (power of herself Would come uncall'd for) but to live by law, Acting the law we live by without fear; And, because right is right, to follow right Were wisdom in the scorn of consequence.
Página 416 - The Principles of Mental Physiology. With their Applications to the Training and Discipline of the Mind, and the Study of its Morbid Conditions.
Página 416 - ADDRESS DELIVERED BEFORE THE BRITISH ASSOCIATION, assembled at Belfast. By JOHN TYNDALL, FRS, President. Revised, with additions, by the author, since the delivery.