John Walter Gregory

Gregory's polar and glaciological work led to his brief selection and service in 1900-1 as director of the civilian scientific staff of the Discovery Expedition. The expedition was in planning during this period, and had not yet set sail for Antarctica when Gregory was compelled to resign from his position upon learning that he was outranked by the expedition's commander, Robert Falcon Scott.

Australia

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After his retirement in 1929, he was succeeded by Sir Edward Battersby Bailey (Glasgow chair in geology 1929–1937). He made several expeditions including one to Cyrenaica in North Africa in 1908, where he showed the same interest in archaeology as in his own subjects; another was to southern Angola in 1912. His journey to Tibet with his son is recorded in To the Alps of Chinese Tibet by J. W. and C. J. Gregory (1923). His other books on geology and geography include:

• Geography: Structural Physical and Compartitive (1908)
• Geology (Scientific Primers Series) (1910)
• Gregory, J. W. (1912). The Making of the Earth. H. Holt and Company.
• The Nature and Origin of Fiords (1913)
• Geology of To-Day (1915)
• Gregory, J. W. (1916). Australia. G. P. Putnam's Sons., in the Cambridge manuals of science and literature
• The Rift Valleys and Geology of East Africa (1921), a continuation of the studies contained in his volume published in 1896
• The Elements of Economic Geology (1927)
• General Stratigraphy (in collaboration with B. H. Barrett) (1931)
• Dalradian Geology (1931)

He wrote books in other subjects as well, such as The Story of the Road (1931), and he dabbled in eugenics with The Menace of Colour (1925)^[12] and Human Migration and the Future (1928).

Death

In January 1932 Gregory went on an expedition to South America to explore and study the volcanic and earthquake centres of the Andes. The expedition, sponsored by the Royal Geographical Society in London, made the first geological traverse of the central Andes of Peru. His boat overturned and he was drowned in the Urubamba River in southern Peru on 2 June 1932.^[13] One of his companions on this expedition was the diplomat, artist and author Victor Coverley-Price who painted extensively whilst on the expedition. He was in Gregory's canoe and narrowly escaped death when it overturned and later wrote about the expedition in his own autobiography and for the Royal Geographical Society.^[14][15]

Legacy

He was president of the Geological Society of London from 1928 to 1930, and was awarded many scientific honours including the Bigsby Medal in 1905. Apart from his books he also wrote about 300 papers on geological geographical, and sociological subjects. Gregory was a modest man, sincere, with wide interests. A fast thinker who did an extraordinary amount of work, it is possible that as a geologist he sometimes generalised from insufficient data; his last work Dalradian Geology was adversely reviewed in the Geological Magazine. Nevertheless, he was one of the most prominent geologists of his period, widely recognised outside his own country. Most of his books could be read with interest by both people of science and the general public, and as scientist, teacher, traveller, and man of letters, he had much influence on the knowledge of his time.

Honours

The Gregory Rift in the Great Rift Valley is named in his honour. He visited central Kenya in 1893 and again in 1919 and his 1896 book The Great Rift Valley is considered a classic. He was the first to use the term "rift valley", which he defined as "a linear valley with parallel and almost vertical sides, which has fallen owing to a series of parallel faults".^[16] The mineral gregoryite, first found in the Great Rift Valley, is named after him.

Racial views

Like many other intellectuals and writers during the 1920s, Gregory held Scientific Racist views based on Galtonism and the belief that opposition to cross-breeding in animals could be applied to miscegenation. In 1931, with Sir Arthur Keith, he delivered the annual Conway Hall lecture entitled Race as a Political Factor. The lecture contained as its abstract: The three primary racial groups within the human species are the Caucasian, mongoloid and negroid. From analogy with cross-breeding in animals and plants, and from experience of human cross-breeding, it can be asserted that inter-marriage between members of the three groups produces inferior progeny. Hence racial segregation is to be recommended. However, the different races can still assist, and co-operate with, each other, in the interests of peace and harmony.^[17]

Family

Gregory married Audrey Chaplin, daughter of the Rev. Ayrton Chaplin, and had a son and a daughter.

Selected works

• The living races of mankind: a popular illustrated account of the customs, habits, pursuits, feasts and ceremonies of the races of mankind throughout the world By Henry Neville Hutchinson, John Walter Gregory, Richard Lydekker (1902) D. Appleton.^{[18][19][20][21][22]}
• The Living Races of Mankind By Richard Lydekker, Henry Neville Hutchinson, John Walter Gregory (1985) Mittal Publications Volume 2^{[23][24][25][26]}
• Gregory, J. W. (1906). The Dead Heart of Australia: A Journey Around Lake Eyre in the Summer of 1901–1902, with some account of the Lake Eyre basin and the flowing wells of central Australia. J. Murray. p. 384 pages.
• Gregory, J.W. 1911. The terms "Denudation," "Erosion," "Corrosion," and "Corrasion". The Geographical Journal 37(2):189–195.
• Gregory, J.W. 1914. The lake system of Westralia. The Geographical Journal 43(6):656–664.
• Gregory, J.W., Evans, J.W., Lamplugh, Mr. and Freshfield, D. 1917. Erosion and resulting land forms in sub-arid Western Australia, including the origin and growth of dry lakes: discussion. The Geographical Journal 50(6):434–437.

Biography

Leake, B. E. 2011. The Life and Work of Professor J. W. Gregory FRS (1864– 1932): Geologist, Writer and Explorer. Geological Society, London, Memoirs, 34.,