Tiedosto:Pierre and Marie Curie.jpg

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KuvausPierre and Marie Curie.jpg	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.
Päiväys	suunnilleen vuonna 1904 date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Lähde	hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Tekijä	TuntematonUnknown author

Public domain	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.	EU
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Päiväystä napsauttamalla näet, millainen tiedosto oli kyseisellä hetkellä.

	Päiväys	Koko	Käyttäjä	Kommentti
nykyinen	14. toukokuuta 2014 kello 11.01	2 163 × 1 740 (1,07 MiB)	Materialscientist	crop
	14. toukokuuta 2014 kello 10.57	3 210 × 2 196 (1,9 MiB)	Materialscientist	Original
	27. heinäkuuta 2012 kello 08.17	2 982 × 2 186 (1 020 KiB)	Materialscientist	better version
	2. kesäkuuta 2008 kello 17.29	2 624 × 1 640 (2,98 MiB)	CarlFromVienna	Eine manuell überarbeitete Version des bekannten Fotos. Details wurden nachgezeichnet zum Abdruck im Reclam-Heftchen nachbearbeitet (also nicht von mir).
	10. huhtikuuta 2007 kello 21.28	1 600 × 1 091 (161 KiB)	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 }}