Frasi di John Dalton (7 frasi) | Citazioni e frasi celebri

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John Dalton Frasi e Citazioni

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“1. Esistono piccole particelle chiamate atomi che compongono tutta la materia; 2. Sono indivisibili e indistruttibili; 3. Gli atomi dello stesso elemento chimico hanno le stesse proprietà chimiche e non si trasmutano o si trasformano in elementi diversi.”

John Dalton

John Dalton: Frasi in inglese

“1. Small particles called atoms exist and compose all matter; 2. They are indivisible and indestructible; 3. Atoms of the same chemical element have the same chemical properties and do not transmute or change into different elements.”

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John Dalton

A New System of Chemical Philosophy, Part I http://books.google.com/books?id=Wp7QAAAAMAAJ (1808) as quoted by Richard Reeves, A Force of Nature The Frontier Genius of Ernest Rutherford (2008)

“Chemical analysis and synthesis go no farther than to the separation of particles one from another, and to their reunion. No new creation or destruction of matter is within the reach of chemical agency. We might as well attempt to introduce a new planet into the solar system, or to annihilate one already in existence, as to create or destroy a particle of hydrogen. All the changes we can produce, consist in separating particles that are in a state of cohesion or combination, and joining those that were previously at a distance.”

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John Dalton libro A New System of Chemical Philosophy

Origine: A New System of Chemical Philosophy (1808), Ch. III. On Chemical Synthesis

“When we attempt to conceive the number of particles in an atmosphere, it is somewhat like attempting to conceive the number of stars in the universe; we are confounded with the thought. But if we limit the subject, by taking a given volume of any gas, we seem persuaded that, let the divisions be ever so minute, the number of particles must be finite; just as in a given space of the universe, the number of stars and planets cannot be infinite.”

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John Dalton libro A New System of Chemical Philosophy

Origine: A New System of Chemical Philosophy (1808), Ch. III On Chemical Synthesis

“Philosophers are generally persuaded, that the sensations of heat and cold are occasioned by the presence or absence, in degree, of certain principle or quality denominated fire or heat… It is most probable, that all substances whatever contain more or less of this principle. Respecting the nature of the principle, however, there is a diversity of sentiment : some supposing it a substance, others a quality, or property of substance. Boerhaave, followed by most of the moderns, is of the former opinion; Newton, with some others, are of the latter; these conceive heat to consist in an internal vibratory motion of the particles of bodies.”

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John Dalton

Meteorological Observations and Essays: Mit Tabellen, 1834 p. 18

“A pure elastic fluid is one the constituent particles of which are all alike, or in no way distinguishable. Steam, or aqueous vapour, hydrogenous gas, oxygenous gas… and several others are of this kind. …Whatever …may be the shape or figure of the solid atom abstractedly, when surrounded by such an atmosphere it must be globular; but as all the globules in any small given volume are subject to the same pressure, they must be equal in bulk, and will therefore be arranged in horizontal strata, like a pile of shot.”

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John Dalton libro A New System of Chemical Philosophy

Origine: A New System of Chemical Philosophy (1808), Ch. II. On the Constitution of Bodies, Sect. 1. On the Constitution of Pure Elastic Fluids

“Now it is one great object of this work, to shew the importance and advantage of ascertaining the relative weights of the ultimate particles, both of simple and compound bodies, the number of simple elementary particles which constitute one compound particle, and the number of less compound particles which enter into the formation of one more compound particle.”

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John Dalton libro A New System of Chemical Philosophy

Origine: A New System of Chemical Philosophy (1808), Ch. III. On Chemical Synthesis

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