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contained radiant heat which had its larg- est intensity beyond the red part of the spectrum. 1 These ‘new rays’ became an issue of investiga- tion for several researchers, most namely John Leslie who published [...] Kingston, Ontario), pp 495-505. Herschel, W. (1800). Experiments on the Refrangibility of the invisible Rays of the Sun. Philosophical Transactions of the Royal Society 90, 284-292. Joule JP (1850): On the [...] developed the first parabolic solar collector. He designed a new collector, which concentrated the rays of sunlight from all sides of absorber. He experimented with a water-filed container enclosed in glass

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• Mouchot and the solar cooker

practical…. On the other hand, what if I put a mirror on the out- side to reflect more of the sun’s rays onto the ab- sorber? That way I could make the device smaller.” Soon, Augustin had completed the construc- [...] was an open-ended cone, with the cu- rious mathematical name of “frustocone,” that focused the sun’s rays along a line on its axis where a narrow cylindrical heat absorber, which contained the steam generator [...] s. Augustin and Abel used the steam generator to drive an ice-making machine, using the hot sun’s rays to produce a block of ice. The people at the fair marvelled at the phenomenon—producing ice from heat

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• Mouchot and the solar cooker

developed the first parabolic solar collector. He designed a new collector, which concentrated the rays of sunlight from all sides of absorber. He experimented with a water-filed container enclosed in glass [...] the conical mirror and implemented in cooker in 1870’s. Parabolic mirror concentrate the reflected rays of sun light to a point and cone concentrate light to a line. Mou- chot found out that cone mirror

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• Mouchot and the solar cooker

physicist Henry Moseley. He demonstrated that a relation existed be- tween the wavelength in the X-ray spectum and the atomic number. From this relation, Moseley concluded: “There are here three possible

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• Mendeleev and the Periodic System

the web and to present certain points about the cathode rays, the X- rays, the rays of Becquerel, the a, b, c, rays or the alpha, βeta, and γ rays, based on a proposed framework data collection. 6. Write [...] Becquerel’s discovery and the Curie couple’s discoveries concerning their researches on the Becquerel’s rays. 3. Describe the procedures which Maria and Pier Curie succeeded to isolate radium and to determine

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• Maria Skłodowska-Curie: discoverer of two radioactive elements

the objective lens; the light rays coming from the object 𝑂 will undergo a double reflection on the rectangular faces of each of the prisms 𝐵, 𝐶, after which the rays will emerge parallel to their original [...] Cornet-Porro or lunette cavalier, whose length is halved by the brilliant idea of cutting the visual ray in two, and bringing it back on its path by a clever combination of two prisms with total reflection [...] 9). Fig. 8 On the left, the longue-vue cornet held by the observer. On the right, the path of light rays inside the longue-vue cornet (Anonymous 1850: 288). Fig. 9 Diagram of the internal structure of the

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• Material Culture

Particularly the analysis of cathode rays appeared to be very promising; among the researchers working in this field was J.J. Thomson. Thomson analyzed these cathode rays and established that they are formed [...] experiments in which he used different cathode materials to emit the rays (which were basically emitted by heating up the cathode, the rays were then accelerated with an electric field). Thomson could show [...] due to Röntgen’s demonstration of the X-rays) opened a new field. Yet, this field was not entered immediately by Becquerel himself or other scientists, but the rays emitted from Uranium salts were just

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• Lavoisier and the conservation of mass

contained radiant heat which had its larg- est intensity beyond the red part of the spectrum. 1 These ‘new rays’ became an issue of investiga- tion for several researchers, most namely John Leslie who published [...] Kingston, Ontario), pp 495-505. Herschel, W. (1800). Experiments on the Refrangibility of the invisible Rays of the Sun. Philosophical Transactions of the Royal Society 90, 284-292. Joule JP (1850): On the

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• Scientific Partnership; James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

contained radiant heat which had its larg- est intensity beyond the red part of the spectrum. 1 These ‘new rays’ became an issue of investiga- tion for several researchers, most namely John Leslie who published [...] Kingston, Ontario), pp 495-505. Herschel, W. (1800). Experiments on the Refrangibility of the invisible Rays of the Sun. Philosophical Transactions of the Royal Society 90, 284-292. Joule JP (1850): On the

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• The hard work of experimenting James Prescott Joule, William Thomson, and the mechanical equivalent of heat.

years old, and she started working with her mother in military hospitals where they operated the X-ray ma- chines, an innovation to surgery that saved a lot of lives of wounded soldiers. At the same time

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• Joliot-Curie and artificial radioactivity