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John Dalton 4. John Dalton John Dalton ... and symbols. Without John Dalton science
would not be where it is at today. Bibliography: http ...
John Dalton. John Dalton John Dalton ... and symbols. Without John Dalton science
would not be where it is at today. Bibliography: http ...
John Dalton 2. John Dalton (1766 - 1844) Around September 2, 1766 John Dalton
was born. ... John Dalton also published a lot of papers on atoms. ...
John Dalton. John Dalton was born in September 5,1766 in Eaglesfield in Cumberland,
England. ... John Dalton went to the Quaker school at Pardshow Hall. ...
John Dalton 3. JOHN DALTON John Dalton lived with his family in Eaglesfield,
Cumberland. They lived in a small thatched cottage. ...
Submitted by freakdavid on November 1, 2006
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John Dalton
John Dalton (September 6, 1766 – July 27, 1844) was an English chemist and physicist, born at Eaglesfield. He is most well known for his advocacy of the atomic theory and his research into color blindness.
Atomic theory
In 1800 he became a secretary of the Manchester Literary and Philosophical Society, and in the following year he presented the important paper or series of papers, entitled Experimental Essays on the constitution of mixed gases; on the pressure of steam and other vapors at different temperatures, both in a vacuum and in air; on evaporation; and on the thermal expansion of gases.
The second of these essays opens with the striking remark,
"There can scarcely be a doubt entertained respecting the reducibility of all elastic fluids of whatever kind, into liquids; and we ought not to despair of affecting it in low temperatures and by strong pressures exerted upon the unmixed gases further."
After describing experiments to ascertain the pressure of steam at various points between 0 ° and 100°C (32° and 212°F), he concluded from observations on the vapor pressure of six different liquids, that the variation of vapor pressure for all liquids is equivalent, for the same variation of temperature, reckoning from vapor of any given pressure.
In the fourth essay he remarks,
"I see no sufficient reason why we may not conclude that all elastic fluids under the same pressure expand equally by heat and that for any given expansion of mercury, the corresponding expansion of air is proportionally something less, the higher the temperature. It seems, therefore, that general laws respecting the absolute quantity and the nature of heat are more likely to be derived from elastic fluids than from other substances."
He thus enunciated Gay-Lussac's law, stated some months later by Joseph Louis Gay-Lussac. In the two or...
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