XXX111 



the expression of their thorough appreciation of the unremitting and 

 most valuable services which, during the long period of 34 years 

 Dr. Tyndall has rendered to the Royal Institution in carrying out the 

 duties of his office services which not only have upheld and have 

 advanced the position of the Royal Institution, but have benefited 

 science and the world at large." 



Professor Tyndall, on his withdrawal from the Institution, declined 

 to receive any pension or pecuniary testimonial in recognition of his 

 services ; and, in severing his long connection with it, desired only 

 to carry with him the friendly recollection and goodwill of the 

 members. At the same meeting of managers, it was resolved unani- 

 mously that Dr. Tyndall be nominated for election at the next general 

 monthly meeting, on Monday, May 9th, as Honorary Professor of 

 Natural Philosophy; and he was so elected on that day. The 

 managers also instituted, at the same time, an annual course of lec- 

 tures to be called the Tyndall Lectures. 



Dr. Tyndall held the post of Examiner in the Royal Military 

 Colleges and in the University of London. In 1866, he succeeded 

 Faraday as scientific adviser to the Trinity House, and occupied this 

 position for 17 years. In 1872 he was invited to lecture in the United 

 States, and realised a considerable sum of money from the large 

 audiences attracted by his eloquence and experimental skill. The 

 whole of this sum, amounting to between 6,000 and 7,000, ho 

 generously devoted to the encouragement of scientific training in the 

 United States, dividing it equally between Columbia College in New 

 York, Harvard College Boston, and the University of Pennsylvania 

 at Philadelphia. 



In 1876, he married Louisa, eldest daughter of the late Lord Claud 

 Hamilton, and received, on the occasion of his marriage, a purse of 

 300 guineas from the members of the Royal Institution, and a 

 medallion bust of himself, in marble, from his fellow members of the 

 X Club. 



Dr. Tyndall was elected a Fellow of the Royal Society in 1852. In 

 1853 a Royal Medal was awarded to him for his researches on magne- 

 crystallic action. He also received the Rumford Medal, in 1864, for 

 his researches on the absorption and radiation of heat by gases and 

 vapours. He was D.C.L. (Oxon.), LL.D. (Cantab., Dubl., et Edin.), 

 and an honorary member of a large number of learned societies at 

 home and abroad. 



The last years of his life, after his retirement from the Royal Institu- 

 tion, were clouded by repeated attacks of illness. In the autumn of 

 1893, his usual sojourn on the Bel Alp appeared to effect a substantial 

 improvement in his health ; but, almost immediately on his return, 

 he had a serious relapse, from which he was gradually recovering, 

 when, on the 4th of December, he died from the effects of an over- 



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