Usòrò:Pierre and Marie Curie.jpg

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Pierre and Maria Skłodowska-Curie in the laboratory, demonstrating the experimental apparatus used to detect the ionsation of air, and hence the radioactivity, of samples of purified ore which enabled their discovery of radium.

Maria is operating the apparatus. With her right hand she is adding/subtracting known weights from a pan hanging from a strip of piezo-electric material which generates a very small elecrical charge (of the order of picoamperes) according to the weight hung on it. This is nulled against the charge accumulated on an ion chamber due to radioactivity. In her left hand she has a stopwatch to measure the rate of change of charge using a quadrant electrometer. When the weight is changed, the time elapsed for the charge to be nulled is measured by the stopwatch. The charge is indicated by a light spot on the scale in front of her projected by the quadrant electrometer, which is off the left of the picture.
Ǹgụ́ụ̀bọ̀chị̀ circa 1904
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Mkpọlọ́gwụ̀ hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Odé ákwụ́kwọ́ Unknown authorUnknown author

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The copyright of this image has expired in the European Union because it was published more than 70 years ago without a public claim of authorship (anonymous or pseudonymous), and no subsequent claim of authorship was made in the 70 years following its first publication.
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dị ùgbu â09:01, 14 Mee 2014NvóÁká màkà otù ȯ dị nà 09:01, 14 Mee 20142,163 × 1,740 (1.07 MB)Materialscientistcrop
08:57, 14 Mee 2014NvóÁká màkà otù ȯ dị nà 08:57, 14 Mee 20143,210 × 2,196 (1.9 MB)MaterialscientistOriginal
06:17, 27 Julaị 2012NvóÁká màkà otù ȯ dị nà 06:17, 27 Julaị 20122,982 × 2,186 (1,020 KB)Materialscientistbetter version
15:29, 2 Jụn 2008NvóÁká màkà otù ȯ dị nà 15:29, 2 Jụn 20082,624 × 1,640 (2.98 MB)CarlFromViennaEine manuell überarbeitete Version des bekannten Fotos. Details wurden nachgezeichnet zum Abdruck im Reclam-Heftchen nachbearbeitet (also nicht von mir).
19:28, 10 Eprel 2007NvóÁká màkà otù ȯ dị nà 19:28, 10 Eprel 20071,600 × 1,091 (161 KB)Kuebi{{Information |Description=Pierre and Marie Curie in the laboratory. Prior 1907. |Source= hp.ujf.cas.cz (uploader=--~~~~) |Date=prior 1907, because Pierre Curie died in 1906 |Author=unknown }}

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