APPENDIX II 307 



SCHWABE, Samuel Heinrich (1789-1875), German 

 astronomer, of Dessau ; carried out observations on sun- 

 spots from 1826, and suggested periodicity of their 

 intensity. 



SCLATER, Philip Lutley (1829-1913), F.E.S. ; secretary, 

 Zoological Soc., 1859-1902. 



SCOBESBY, Kev. William (1789-1857), F.E.S. ; served 

 under father, Arctic navigator ; vicar of Bradford, 1839-47. 

 Eesearches in phenomena of Arctic seas. 



SHARPEY, William (1802-80), F.E.S.; M.D., Edin- 

 burgh ; joint lecturer on systematic anatomy, Edinburgh, 

 1832 ; professor of anatomy and physiology, Univ. Coll., 

 London, 1836-74. 



SIMPSON, Sir James Young (1811-70), professor of 

 midwifery, Edinburgh, 1839 ; introduced use of chloroform, 

 1847 ; researches in and publications on obstetrics and 

 anaesthetics ; Bart., 1866. 



SMITH, Henry John Stephen (1826-83), F.E.S., mathe- 

 matical tutor, Balliol Coll., Oxford ; Savilian professor of 

 geometry, 1860-83. 



SMITH, William (1769-1839) ; canal surveyor, 1793 

 seqq. ; authority on drainage, irrigation and stratigraphy ; 

 ' father ' of English stratigraphical geology ; first producer 

 of English geological maps. 



SORBY, Henry Clifton (1826-1908), F.E.S., researches in 

 microscopic investigation of rocks, crystals and metals ; 

 associated with foundation of Sheffield University. 



SPEKE, John Banning (1827-64), explorer, with Burton 

 in Somaliland, 1854 ; great lakes of central Africa, 1856 

 seqq. ; with Grant in east central Africa, 1861-68, investi- 

 gating sources of the Nile. 



STEWART, Balfour (1828-87), F.E.S. ; assistant to 

 Forbes at Edinburgh, 1856 ; director, Kew Observatory, 

 1859-71 ; secretary, Meteorological Committee, 1867-69 ; 

 professor of natural philosophy, Owens Coll., Manchester, 

 1870-87. Eesearches on radiant heat, sun-spots, terres- 

 trial magnetism, etc. A founder of Soc. for Psychical 

 Eesearch. 



