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contacted in two different ways. First with a person at rest and second with a person at work We found that the person at work produces more carbon dioxide than the other at rest, which means that the [...] person was subjected to. Firstly the person was at rest, and secondly he/she was at work”. Lavoisier started to refer to his inferences from the experiment. “I assumed that the purpose of the human

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• Antoine Laurent de Lavoisier and respiration

of insects, mostly moths, butterflies, and their larvaes. Second part was published in Frankfurt in 1683. On each of the hundred copperplates (each containing 50 tables) Maria presented one or more [...] The bequest was, however, burdened with debts. But, in 1683 the second part of Maria book Caterpillar containing another 50 tables and accompanying text appeared. It was published by Johann Andreas in [...] (which no longer exists). Unfortunately, she not reached the second edition Insectorum Surinamensium, which was published in Amsterdam in 1719. Maria Sibylla Merian's during the lifetime became famous

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• Sybilla Merian and Cocoons

: first, that the total heat of the universe is constant, and second, that the heat present in matter is a function of the matter and its state. He also assumed that caloric fluid was a substance and

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• Antoine Laurent de Lavoisier and respiration

ever dig!” What a major stroke of luck—although he had placed second in the scholarship competition, the prize had been awarded to him when the win- ner decided not to take it. The second major turning [...] he had been induced to move to Manchester, England to accept his second job as head professor of physics there. One spring day, in March of 1909, Ernest Rutherford was sitting at his desk, deep in thought

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• Rutherford’s Nuclear Atom

for considerations of purpose, whether natural or divine. The second factor was the ad hoc nature of the atomists’ ex- planations. (Losee 2001, 25) Additionally, there was a rival concept of the four

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• Maria Skłodowska-Curie: discoverer of two radioactive elements
• Joliot-Curie and artificial radioactivity
• Rutherford’s Nuclear Atom
• Dalton and the atoms
• Lavoisier and the conservation of mass
• Democritus and the atoms

mass of nitrogen in relation to the mass of oxygen was 7:8, in a second compound 7:16, and in a third, 7:4. Based on his analyses he for- mulated the law of multiple proportions. This law says that if

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• Dalton and the atoms
• Lavoisier and the conservation of mass

been another water atomon, then does the first atomon enter the second?” “No, of course not, what an absurd question” replied Democritus . “Fine, you are beginning to see how absurd your concept is” [...] there is an atomon at all?” Plato pretended to be puzzled for a second and then responded: “Well, do you really think that there is a space that is completely empty? Do you think that in water there is

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• Democritus and the atoms

spurious path leading to atheism. Alchemy was still present in the second centu- ry, but it was collection of nonsensical, fantastic tales, magic formulas, and recipes full of symbols, strange metaphors

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• Democritus and the atoms

between May 1 and October 31, the mirror was completed only by the second of September. At that time, the collector was able to bring 70 litres of water to a boil in half an hour and generate steam pressure

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• Mouchot and the solar cooker

experiments he deter- mined the coefficient as 838 ftlb/BTU, in a second series published in the same article he gave 770 ftlb/BTU. Looking at the data Joule published gives some insight into Joule's [...] France from Eng- lish coal. This was the moment when the French second- ary school teacher Augustin Mouchot entered the stage. Mouchot combined two devices that had been known previously: A blackened

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• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.
• Mouchot and the solar cooker
• Rumford and calorics