Article (Scientific journals)
Sur la limite de visibilité de la fluorescence et sur la limite supérieure du poids absolu des atomes d'hydrogène
Spring, Walthère
1905In Bulletin de la Classe des Sciences. Académie Royale de Belgique, (5), p. 201-211
 

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Keywords :
Atomic weight; Hydrogen; Fluorescence; Masse atomique; Hydrogène
Abstract :
[en] Spring, W. Bulletin de la Classe des Sciences, Academie Royale de Belgique (1905), 201-11; SciFinder (Chemical Abstracts Service: Columbus, OH); https://scifinder.cas.org (accessed July 8, 2010). A solution of fluorescein in optically pure water was subjected to the action of a powerful beam of electric light, and the limit of dilution was observed at which a visible green fluorescence was produced. Assuming under these conditions that one cubic millimetre of the solution contained one molecule of fluorescein (C20H10O5K2 = 408), the value 2.5 × 10-21 grams is obtained for the superior limit of the weight of the atom of hydrogen, which is one-twenty-thousand-millionth part of the value 5 × 10-11 calculated by Annaheim (this Journal, 1877, i, 31), but is about seven thousand times as great as the value 3.45 × 10-25 calculated from the kinetic theory of gases. Reprinted with the permission of the American Chemical Society. Copyright © 2010. American Chemical Society (ACS). All Rights Reserved
Disciplines :
Chemistry
Author, co-author :
Spring, Walthère ;  Université de Liège - ULiège
Language :
French
Title :
Sur la limite de visibilité de la fluorescence et sur la limite supérieure du poids absolu des atomes d'hydrogène
Alternative titles :
[en] Limits of Visibility of Fluorescence and the Maximum Value of the Absolute Weight of the Atom of Hydrogen
Publication date :
1905
Journal title :
Bulletin de la Classe des Sciences. Académie Royale de Belgique
ISSN :
0001-4141
Publisher :
Académie Royale de Belgique, Bruxelles, Belgium
Issue :
5
Pages :
201-211
Available on ORBi :
since 09 August 2010

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