Fragments of science for unscientific peopleD. Appleton, 1875 - 422 páginas |
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Página xvi
... quantities . Sweden , England , Russia , India , whence we had previously derived this metal , were closed to us . " We wanted steel " It came to us from foreign countries ; the art of making it was unknown in our forges and our ...
... quantities . Sweden , England , Russia , India , whence we had previously derived this metal , were closed to us . " We wanted steel " It came to us from foreign countries ; the art of making it was unknown in our forges and our ...
Página 14
... to the quantity of the attracting matter , regardless of its quality . But in the molecular world which we have now entered matters are otherwise arranged . Here we have atoms between which a 14 FRAGMENTS OF SCIENCE .
... to the quantity of the attracting matter , regardless of its quality . But in the molecular world which we have now entered matters are otherwise arranged . Here we have atoms between which a 14 FRAGMENTS OF SCIENCE .
Página 19
... instance ? No ; it would be four times that quantity . A body starting with twice the velocity of another , will rise to four times the height ; in like manner , a threefold velocity will THE CONSTITUTION OF NATURE . 19.
... instance ? No ; it would be four times that quantity . A body starting with twice the velocity of another , will rise to four times the height ; in like manner , a threefold velocity will THE CONSTITUTION OF NATURE . 19.
Página 21
... quantity of heat generated by the stoppage of its motion would be that stated above . Six times that ve- locity , or 1,338 feet , would not be an inordinate one for a cannon - ball as it quits the gun ; but if animated by six times the ...
... quantity of heat generated by the stoppage of its motion would be that stated above . Six times that ve- locity , or 1,338 feet , would not be an inordinate one for a cannon - ball as it quits the gun ; but if animated by six times the ...
Página 22
John Tyndall. of force asserts that the quantity of force in the universe is as unalterable as the quantity of matter ; that it is alike impossible to create force and to annihilate it . But in what sense are we to understand this ...
John Tyndall. of force asserts that the quantity of force in the universe is as unalterable as the quantity of matter ; that it is alike impossible to create force and to annihilate it . But in what sense are we to understand this ...
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.