Obituary — Professor George Alexander Louis Lehour. 287 



A special search was made for sulphur and phosphorus, giYing the 

 figures : — 



Marked 18. Marked 21. 



o/ o/ 



Sulphur 0-055 0-0°74 



Phosphorus . . . . 0-109 0-115 



Both samples are titaniferous iron-ore of moderate quality. 



Ernest Gibson. 

 25 Cadogan Place, London, S.W.I. 

 May 5, 1918. 



OBIT"Cr.A.I^"Z-. 



PROFESSOR GEORGE ALEXANDER LOUIS LEBOUR, 



M.A., D.Sc, E.G.S., Vice-Pkincipal of the Aemstkong College, 



jS^ewcastle-tjpon-Ttnk. 



Born 1847. Died February 7, 1918. 



BY the death of Professor Lehour in his 71st year, ou February 7, 

 1918, the scientific world loses a prominent and interesting 

 figure. Born in 1847 and educated at the Boyal School of Mines, 

 he served from 1867 to 1873 on the Geological Survey of England 

 and Wales. He was lecturer in geological surveying at the 

 University of Durham College of Science (later, Armstrong College) 

 in Newcastle from 1873 to 1879, and succeeded Dr. David Page as 

 Professor of Geology in the University. This position he occupied 

 until his death, so that for forty-five years he was connected with 

 the College, and for thirty-nine years occupied the chair of Geology. 

 In 1904 he was awarded the Murchison Medal by the Council of the 

 Geological Societ)', and in the same year was elected Vice-Principal 

 of Armstrong College. 



The transference of heat through the crust of the earth occupied 

 Lebour's attention early and led to measurements of underground 

 temperature in northern coal-pits, and also in conjunction with 

 Herschel, to the determination of the thermal conductivities of 

 a great number of rocks. This important work, issued in a series 

 of British Association reports from 1873 to 1881, is well known, and 

 many of the data obtained are accepted as standard. 



Lebour's name will always be associated with the geology of 

 Northumberland and Durham. Besides his official maps, he brought 

 out in 1877 an excellent geological map of the county of Northumber- 

 land, which is the embodiment of much strenuous, clear-sighted 

 labour. He was joint author with William Topley of a widely 

 quoted paper on the Great Whin Sill, which may be said to have 

 definitely established its intrusive character. The stratigraphical 

 relations of the Carboniferous rocks form the subject of many papers, 

 in which the divisions of the system and the description and 

 correlation of the important limestones, etc., are set forth with 

 admirable lucidity. The economic aspects of the subject find 

 expression in papers on the Kedesdale Ironstones and the coals of 

 the Bernician series, especially those associated with the Little 

 Limestone. The future importance of these coals, which occur in 



