2 Eminent Living Geologists — 



long since outgrown, obliged Teall to be non-resident during the Lent 

 Term of 1871, but notwithstanding this he obtained a first class ia 

 the Natural Science Tripos of 1872, graduated B.A. in 1873, and 

 proceeded to M.A, in 1876. 



Teall was elected to a Fellowship of his College in 1875, which he 

 vacated four years later on his marriage with Harriet, daughter of 

 the late G. R. Cowen, of Nottingham. 



In 1874, while still partially resident at Cambridge, he obtained the 

 Sedgwick Prize for an essay on the Potton and Wicken Phosphatic 

 Deposits. This was the first award of that prize, and the essay was 

 published, with some additions, in 1875. 



After taking his degree Teall was engaged for several years in 

 lecturing on Physics, Physical Geography, Geology, and other scientific 

 subjects under the University Extension Scheme, attracting large classes 

 at Derby, Nottingham, and other towns in the Midland counties, in the 

 north and west of England, and in the London district. 



TJltimatelj- Teall began to give his special attention to the micro- 

 scopic structure of rocks, in which he received much encouragement 

 from his former Tutor, and afterwards from Professor Rosenbusch. 



Among his earlier contributions to petrological science were 

 researches on the Cheviot Andesites and Porphyrites, on the North. 

 of England Dykes, and on the AVhin Sill. Their publication at once 

 gave him a high place among petrologists, and he soon increased his 

 reputation by important papers on the metamorphism of Dolerite into 

 Hornblende Schist, on the Lizard Gabbros, and on the origin of 

 certain Banded Gneisses. 



In 1886 he commenced the publication, in parts, of his magnum 

 opus, the British Fetrograpliy, a work for which he was ex- 

 ceptionally qualified by his knowledge of chemistry and mineralogy, 

 his experience in field-geology, and his a^'quaintance with geological 

 literature. This volume, characterized like all his work by thorough- 

 ness, embodies, in addition to the necessary summary of the researches 

 of others, a large amount of original research and many suggestive 

 observations ; while the coloured plates of microscopic sections were 

 far superior to any that had appeared in this country. Not only so, 

 but unless the author had incurred serious pecuniary risk in addition 

 to his heavy labour, the book, owing to the failure of the original 

 publisher, would have remained incomplete. The original drawings 

 for several of the plates were made by Mrs. Teall. 



In 1888 Mr. Teall was appointed to the post of Geologist on the 

 Geological Survey of the United Kingdom, under Sir Archibald 

 Geikie, to take charge of the petrographical work and to deal more 

 especially with the crystalline schists. Here it may be mentioned 

 that this branch of the work of the Geological Survey had been 

 initiated in earlier days by Sir Archibald Geikie, when" Director in 

 Scotland, and by J. Clifton Ward in the Lake District. It was 

 afterwards specially attended to in the Geological Survey Office 

 in London by Frank Eutley, who formed the first Petrographical 

 Laboratory. On his retirement in 1882 Mr. F. W. Riidler was 

 deputed to deal with the subject so far as his time permitted, but 

 needless to say he could not be spared for any continuous research. 



