APPENDIX 



BRIEF BIOGRAPHICAL NOTES CONNECTED WITH THE PORTRAITS 



PROFESSOR SVANTE AUGUST ARRHENIUS is Director (since 1905) o e 

 the Physico- Chemical Department of the Nobel Institute in Stock- 

 holm. 



He received his education at Upsala, and took his degree of Ph.D. 

 at the University of that town in 1884. He began teaching physics 

 as Privat- docent immediately after graduation, and held office 

 successively as Teacher of Physics (1891), Professor of Physics (1895), 

 and Rector (1897-1902) in the same University. 



Professor Arrhenius is famous as the originator of the ionic 

 dissociation theory, whereby the chemical properties of substances 

 are connected with the electric conductivity of their solutions. He 

 has also published a large amount of experimental work in support 

 of his views and their application in chemistry and physiology. 



In 1902 he was awarded the Davy Medal by the Royal Society, 

 and in 1903 he received the Nobel Prize for Physics. He is a member 

 of many academies and learned societies in Europe and America. 

 In 1898 he was elected one of the forty Honorary Members of the 

 Chemical Society, and in 1910 he became a Foreign Member of the 

 Royal Society. 



In 1914 Professor Arrhenius delivered the Faraday Memorial 

 Lecture in the Royal Institution, where this lecture is given about 

 once in three or four years, always by a very distinguished foreign 

 chemist. He received at the same time the Faraday Medal from the 

 Chemical Society. 



Beside textbooks and works on Electro-Chemistry Arrhenius 

 has published Worlds in the Making (1908), and Life of the Universe 

 (1909). 



PIERRE EUGENE MARCELLIN BERTHELOT was born in the heart 

 of old Paris, in the Place de Greve, on October 25th, 1827. He 

 died in Paris, March 18th, 1907. 



The son of a physician, Dr. Jacques Martin Berthelot, he received 

 a sound classical education and retained throughout life a love of 

 ancient literature. After leaving school he completed a full medical 



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