John Dalton

John Dalton: Encyclopedia II - John Dalton - Biography

John Dalton - Early life. Dalton received his early education from his father and from John Fletcher, a teacher of the Quaker school at Cumberland, on whose retirement in 1778 he himself started teaching. This youthful venture was not successful, the amount he received in fees being only about five shillings a week, and after two years he took to farm work. But he had received some instruction in mathematics from a distant relative, Elihu Robinson, and in 1781 he left his native village to become assistant to his ...

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John Dalton: Encyclopedia - Burgundians

The Burgundians or Burgundes were an East Germanic tribe which may have emigrated from mainland Scandinavia to the island of Bornholm, whose old form in Old Norse still was Burgundarholmr (the Island of the Burgundians), and from here to mainland Europe. In the Thorsteins saga Víkingssonar, Veseti settled in an island or holm, which was called Borgund's holm, i.e. Bornholm. Alfred the Great's translation of Orosius uses the name Burgenda land. The poet and early mythologist Viktor Rydberg (1828–18 ...

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Burgundians - Early History

Burgundians - The Burgundian Kingdoms

John Dalton: Encyclopedia - Atomic mass unit

The unified atomic mass unit (u), or dalton (Da), is a small unit of mass used to express atomic masses and molecular masses. It is defined to be 1/12 of the mass of one atom of carbon-12. 1 u = 1/NA gram = 1/(1000 NA) kg (where NA is Avogadro's number) 1 u ≈ 1.66053886 × 10−27 kg See 1 E-27 k ...

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John Dalton: Encyclopedia - Atomic theory

In physics, atomic theory is a theory of the nature of matter. It states that all matter is composed of atoms. The philosophical background of the atomic theory is called atomism. The theory applies to the common phases of matter, namely solids, liquids and gasses, as directly experienced on Earth. Strictly speaking, it is not the approriate theory for plasmas or neutron stars where unusual environments such as extremes of temperature or density prevent atoms from forming. Atomic theory - Importance. Arguab ...

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Atomic theory - Related lists

John Dalton: Encyclopedia - Cardiac surgery

Cardiac surgery is surgery on the heart, typically to treat complications of ischemic heart disease (e.g. coronary artery bypass grafting), correct congenital heart disease, or treat valve problems created by various causes including endocarditis. Cardiac surgery - History. The earliest operations that might be considered cardiac surgery were limited to the pericardium, and were pioneered by, among others, Francisco Romero[1], Dominique Jean Larrey, Henry Dalton, and Daniel Hale Williams. The first ...

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Cardiac surgery - History

John Dalton: Encyclopedia II - The Dalton School - The Dalton Plan

Inspired by the intellectual ferment at the turn of the century, educational thinkers, such as John Dewey, began to envision a new, progressive, American approach to education. Helen Parkhurst caught the spirit of change and created the Dalton Plan. Aiming to achieve a balance between each child's talents and the needs of the growing American community, Helen Parkhurst created an educational model that captured the progressive spirit of the age. Specifically, she had these objectives: to tailor each student's program to his or her needs, int ...

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