vii 



Survey lasted from 1861 to 1874. He ranked as an assistant 

 geologist from 1861 to 1867, and as a geologist to the close of his 

 Survey career. 



Daring the time of his connexion with the Survey, he was 

 engaged first in mapping the Jurassic rocks in the Midlands, and 

 afterwards in surveying the Carboniferous rocks in Derbyshire, 

 Yorkshire, and the bordering counties. The broader results of his 

 tield work became embodied in a large number of published maps of 

 the Geological Survey, some upon the 1-iuch and some upon the 

 6-inch scale. But several detailed survey memoirs, descriptive of 

 the country surveyed by himself and his colleagues, were written 

 wholly or in part by him. Among these may be mentioned " The 

 Geology of Banbury " (1864), " Geological Description of the 

 Country round Stockport" (1866), " Tadcaster " (1869), "Dews- 

 bury" (1871), "Barnsley " (1878), and "Wakefield" (1879). 



A memoir on the geology of North Derbyshire, of which the first 

 edition was issued in 1869 and the second in 1887, was also written 

 chiefly by Mr. Green. But his most important survey publication 

 was his " Geology of the Yorkshire Coalfields," issued in 1878. 

 This work is one of the largest, and from an economic point of view, 

 certainly the most important memoir of a single coalfield yet pnb- 

 lished by the Geological Survey of England and Wales. It gives an 

 exhaustive account of the structure and economic aspects of all 

 those parts of the great Yorkshire coalfield which lie around the 

 chief manufacturing centres of that county. It is a complete 

 record of the detailed work laboriously accomplished by Mr. Green 

 and bis colleagues on the Survey, and it contains one of the best 

 descriptions of the British coal measures in the language. 



From this time forward Mr. Green became naturally regarded as 

 one of tbe leading British authorities upon all geological matters 

 connected with coal and coal mining, and the relationship of geolo- 

 gical structure to economics in general. 



In 1870 he resigned his post on the Survey, having been appointed 

 Professor in Geology in the newly founded Yorkshire College at 

 Leeds. Students of geology, however, were few in number, and 

 funds were not superabundant; but Green's energy and abilities 

 found ample scope, for, in addition to holding the geological chair, 

 he was appointed to the Professorship of Mathematics in the same 

 College, and he acted also as lecturer upon the subject of Physical 

 Geography. 



Professor Green's connexion with the Yorkshire College ceased in 

 1888, when, upon the resignation of Professor Prestwich, he was 

 appointed to the Chair of Geology in the University of Oxford. He 

 threw himself with his characteristic energy heartily into his new 

 work, giving not only the ordinary courses of lectures and laboratory 



