Sur une substance nouvelle radio-active, contenue dans la pechblende

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CURIE, P(IEUHE), et Kme.(MAitlE) S(KLOEOWSKA) CUHIE. Sur une svihst:i>.\c6 nouvelle radio-nctive contenue tîans le pechblende . Note... présentée par (Henri) Becquerel. Pages 175-''7S in: Comptes rendus hebdomadaires des siReances de l'Acaderr.ie c'es Sciences, vol. 127 ( = Juirjet -Lécembre) , no. 5 (=Séance du lundi 16/^uillet)

CjRlE,P{lERi<Ej fnme.?.{UARlE SKLODOV-SKA) CUrilE et.G.aEMONT. Sur une nouvelle substance fortement radio-act ive, contenue dans la pechblende. Note .. .présentée par (Henri) Becquerel. Pages 1215-1 P17» continued on page 1?18 by EUG .DLMRCAY. ;:ur le Spectre d'une substance radio-activèi 'In: Comptes reddus... vol. 127» no. 26 (=Séance du lur'' i % riecembre), Paris, Ganthior-Viliars 1896. Collation of the volume: 13o2 pp. With woodcuts in the text."~Orig. wrapners. 4t o.

• tîissing the back wrapper, front wrapper loose -vaterstained and torj stitching loose in binding, joint split, first and last leaves browned, but otherv.'ise partly unopened and in good state.

G.-i;.2oo3. - Becquerel 's bibliography . (in his : Recherches ... 1 9o3) , Nos, 16,18 and 19.

FIRST AFPEAhANCE IN PitlNT OF THE DISCOVERY OF PJLOIJIU;,! AND RADIUM by the Curiest estent ially the work of Mme. Curie.

"The Curies, r^udyint; the radioactivity of miner-iir, coritairirg uranium and thorium, isolated from pitchblende n auOotanoc v,aich +aey

called radium an8 which they showed to possess an astonishing degree of radioactivity . Since then radium has proved to be a valuable agent in the treatment of cancer. They shared the Nobel Prize for Physics with Becquerel in 19o5 and i.iarie Curie received the Nobel Prise for Chemistry in 1 91 1 " . (G.-M)

Horbit 19, Dibner 164, and P. il. M. 594, quote Mme. Curie 's thesis of ' 1903 ( "tiecherches sur les substances radioactives") which is a later compréhension of her researches. The paper:; offered above, of which reprinte never hâve been issued, are the c^nuine first announcements of thèse «pochai discoveries.

"In a séries of papers beé^inning in 1897 in the "Comptes rendus" th^- (the Curies) reported progrès? in their researches. First they isolated a new substance about 5OO timcs as active as radium. This they called polonium in honoar of Marie 's native Poland. A further exami*nation of the residue of pitchblende after the removal of uranium and polonium disclosed residual radio-act ivity far greater than was possessed by either substance alone. lo this material the name of radium was given. This was in 1698 and already Marie was ablc to estimate its probable atonie weight as 226,2..." (PMiKi) The volume contains also contributions by H. Becquerel, H.Moissan ,and further 5 contributions on cathodic-rays , and 2 on x-rays.

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