OBITUARY NOTICES OF FELLOWS DECEASED. 



RUDOLF JULIUS EMMANUEL CLADSIUS was born on the 2nd January, 

 1822, in Ctfslin, in Pomerania. He was tlie sixth son of the Rev. 

 C. E. G. Clausius, D.D., Councillor of the Royal Government School 

 Board, and later, Superintendent in Ueckermiinde. 



After the completion of his studies in the Gymnasium in Stettin, ho 

 attended the University of Berlin from 1840 to 1844. In the Easter 

 of 1844 he passed his examination " pro facultate docendi," and then 

 finished his year of probation at the Frederic- Werder Gymnasium. 

 Here he taugbt the higher classes mathematics and physics. In the 

 autumn of 1846 he entered Boeck's Royal Seminary for higher 

 students. On the 15th July, 1848, he took his degree in Halle 

 " eximia cum laude " (subject of dissertation " De iis Atmosphaeraa 

 Particulis qnibus Lumen reflectitur "). On the 25th September, 1850, 

 he was invited to be Professor of Physics in the Royal Artillery and 

 Engineering School at Berlin. On the 18th December he delivered 

 his inaugural lecture as doc&tit at the University of Berlin (" De 

 Motu Corporum rotantium in Aere resistente "). On the 29th August, 

 1855, he was called to be Ordinary Professor in the Polytechnicum in 

 Zurich, and also at the same time in the University of Zurich. In 

 1867 he was appointed Professor in the University of Wvirzburg, and 

 in 1869 he went to Bonn, where he fulfilled his duties till the day of 

 his death, the 24th August, 1888. 



While at Zurich he married, on the 13th November, 1859, Adelheid 

 Rimpam, of Brunswick. They had six children, of whom two 

 daughters and two sons are alivo. His wife died in 1875, and he 

 married again, in 1886, Sophie Sack, of Esseii, by whom he had one 

 son. 



His brother, Herr Robert Clausius, thus writes of the character of 

 this great man : 



" I had often the opportunity of admiring the rare energy and 

 clearness with which, in a small study and with limited means, he 

 untiringly pursued his great scientific aims. A chief characteristic 

 was his sincerity and fidelity. Every kind of exaggeration was 

 opposed to his nature. Even as a youth all intimate with him learnt 

 to esteem his reliability and truthfulness. In the Gymnasium and in 

 all circumstances of his later life the greatest confidence and trust 



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