Wissenschaftliche Abhandlungen, Volumen3J.A. Barth, 1895 |
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Términos y frases comunes
Abgedruckt in Wissenschaftl Abhandlungen Action Aenderungen Aether amount atoms Auge Bedingungen beiden Beobachtungen bestimmt Bewegung bezeichnen beziehlich chemical constant Coordinaten current Curve dichromatischen Differentialquotienten Druck einander electric electricity elektrischen elektrischer Ströme elektro Elektrodynamik elektrolytischen elektromotorische Kraft Energie Entropie entsprechen ergiebt ersten Fall Farben Flüssigkeit force Form Function galvanometer Gase gegeben Geschwindigkeiten Gesetz giebt gleich Null Gleichungen great Grenze Grenzfläche Grössen heat Helligkeit Helmholtz Hermann von Helmholtz Höhe Horopter integrirender Nenner kleinsten Wirkung Knallgas Körper lebendige Kraft letzteren lich Lichtstärke magnetischen mecha mechanical monocyklischer Systeme motion muss negative Netzhaut nothwendig Objecte oxygen P₁ point Polarisation positive power Processe produced Product quantity Quecksilber Reihe same Schichten setzen Ströme System Temperatur Theil Theorie trichromatische Ueber unserer Variation Verhältniss verschiedenen Versuche visual line vorkommen Wärme Wasser Wasserwellen Wellen Wellenlänge Werthe wieder work Zahlen zwei zweiten ән дра
Pasajes populares
Página 594 - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Página 359 - Ich betrachte die Arithmetik, oder die Lehre von den reinen Zahlen, als eine auf rein psychologischen Thatsachen aufgebaute Methode, durch die die folgerichtige Anwendung eines Zeichensystems (nämlich der Zahlen) von unbegrenzter Ausdehnung und unbegrenzter Möglichkeit der Verfeinerung gelehrt wird.
Página 53 - They were very divergent from the trodden path of scientific theory, and appeared rather startling to his contemporaries. His principal aim was to express in his new conceptions only facts, with the least possible use of hypothetical substances and forces. This was really an advance on general scientific method, destined to purify science from the last remnants of metaphysics.
Página 576 - ... up a declivity. If we go up the declivity of a hill we raise the weight of our own body. In the treadmill the same work is done, only the mill goes always down, and the man on the mill remains in his place. Now we have researches on the amount of air which is taken in and of carbonic acid given out during such work in the treadmill, made by Dr. Edward Smith. He found that a most astonishing increase of respiration takes place during such work. Now you all know that if you go up a hill you are...
Página 86 - ... that every unit of affinity is charged with one equivalent either of positive or of negative electricity, they can form compounds, being electrically neutral only if every unit charged positively unites under the influence of a mighty electric attraction with another unit Every affinity charged negatively....
Página 83 - You see, therefore, if we use the language of the dualistic theory and treat positive and negative electricities as two substances, the phenomena are the same as if equivalents of positive and negative electricity were attracted by different atoms, and perhaps also by the different values of affinity belonging to the same atom, with different force.
Página 566 - This other law indeed is true ; but it is not the same as the principle of conservation of force. We may express the meaning of the law of conservation of force by saying, that every force of nature when it effects any alteration, loses and exhausts its faculty to effect the same alteration a second time. But while, by every alteration in nature, that force which has been the cause of this alteration is exhausted, there is always another force which gains as much power of producing new alterations...
Página 119 - Systemen solche mechanische Systeme, in deren Innerem eine oder mehrere stationäre, in sich zurücklaufende Bewegungen vorkommen, die aber, wenn es mehrere sind, in ihrer Geschwindigkeit nur von einem Parameter abhängen. Ich setze ferner voraus, dass zwischen den einzelnen Körpern, welche das System bilden, nur conservative Kräfte wirken, beziehlich feste Verbindungen bestehen, während die äusseren Kräfte, welche noch hinzukommen, nicht nothwendig conservativ zu sein brauchen.
Página 53 - Faraday's contemporaries, appeared either vague or obscure ; and it is in the highest degree astonishing to see what a large number of general theorems, the methodical deduction of which requires the highest powers of mathematical analysis, he found by a kind of intuition, with the security of instinct, without the help of a single mathematical formula.
Página 546 - Weise, dass man sich erinnert, denselben Vorgang schon öfter beobachtet zu haben, ihn also als einen schon bekannten anerkennt. Höchstens bei den ersten Wiederholungen seltenerer Beobachtungen dieser Art wird die Erinnerung an die frühe*) In der ersten Auflage meines Handbuches der physiologischen Optik.