xxxvi Annual Report of the Council. 



his marriage, in 1865, he with his wife made a fourth journey 

 to Central America. Mr. Salvin was a lepidopterist of note as 

 well as an ornithologist, and these expeditions in Tropical 

 America furnished him with material not only for the monu- 

 mental work, the Biologia Centrali-Americana, but for the 

 remarkable and numerous series of papers published subsequently 

 on the ornithology of Central and South America in The Ibis, 

 the Proceedings of the Zoological Society of Londoji, and the 

 British Museum Catalogue of Birds. It is quite impossible in 

 this short notice to do justice to the work accomplished by 

 Mr. Salvin, but this may be truly said — that he was an almost 

 unrivalled "all round" ornithologist and his name will ever 

 remain amongst the most prominent of those who have made 

 this rich field the special subject of life -long research. He was 

 elected an Honorary Member of this Society on April 26, 1892. 

 Fuller notices of his life are to be found in the Proceedings of the 

 Royal Society, vol. 64, pp xiii.-xvii. ; the Auk, vol. 15, pp. 

 343-5, and the Ibis, 1898, pp. 626-7. F- N. 



By the death, on the 23rd March, 1899, of Gustav 

 Heinrich Wiedemann, Professor of Physics at the University 

 of Leipsic, the Society has lost one of the most distinguished 

 and widely known of its honorary members. He was born 

 at Berlin, on the 2nd October, 1826, and, after losing his 

 parents at an early age, was brought up by his grandparents. He 

 received his early education at the Kollnisches Real-gymnasium 

 at Berlin, and in 1844 entered as a student at the University, 

 determined, as he himself has stated, " to study thoroughly as 

 auxiliary subjects Mathematics and Chemistry, and then to 

 devote himself to Physics." After studying under Mitscherlich, 

 Dirichlet, and Magnus, and after receiving his Docentship in 

 185 1, he married Clara Mitscherlich, and in 1854 he was 

 appointed Professor of Physics at Basle. After nine years of 

 active scientific work he was removed to Brunswick, again in 

 1866 to the Hochschule at Carlsruhe, and finally in 187 1 to the 

 University of Leipsic, where he remained till his death. His 



