Гарольд Максвелл Лефрой: Англиялық энтомологтың өмірі мен еңбектері

English entomologist

Harold Maxwell Lefroy (20 January 1877 – 14 October 1925) was an English entomologist. He served as a Professor of Entomology at Imperial College London before moving to India where he took over the position of entomologist to the government of India from Lionel de Niceville. He was later made the first Imperial Entomologist to India. He left India after two of his children died from insect borne diseases. He worked on applied entomology and initiated experiments on the use of chemicals to control insects. A formula he developed was utilized to save Westminster Hall from destruction by wood boring beetles, while others were used to control lice in the trenches during the First World War. The success of his chemicals led to increased demand and the founding of Rentokil, a company for insecticide production. He was killed in an accident while experimenting with fumigants to control insects.

Maxwell Lefroy was born in the village of Crondall, Hampshire, to Charles James Maxwell Lefroy of the 14th Hussars (whose grandfather was James Walker who had designed the Regent or Vauxhall Bridge in 1816) and Elizabeth Catherine, daughter of Alfred Henry McClintock, a Dublin surgeon. The hyphenated form Maxwell Lefroy was adopted in 1875. He grew up in the family's Itchel Manor, on an ancient site which had once been property of the Bishop of Winchester. The manor itself is mentioned in the Domesday Book, and was filled with stories of ghosts and their hauntings (and demolished in 1954). As a child he was raised in an environment of opulence, with many servants at home to take care of the house and his needs.

Harold was sent to school in Church Hill House in Crondall where one of his contemporaries, although a boarder unlike Maxwell Lefroy, was Claude Grahame White. He was later sent to study in Germany, and after returning to England in 1890 he was sent to Marlborough College where he was in Preshute House under master W. E. Mullins. Oddly he did not join the Natural History Society at school, contemporary members of which included William Keble Martin, Arthur Hill, and Lawrence C. H. Young (who went to Bombay in 1901 to work in a local business and also contributed to studies of the lepidoptera in the Bombay Natural History Society collections and died young in 1907). He finished school in 1895 and joined King's College, Cambridge, receiving a BA in the natural science tripos with first class in 1898. His specialization in entomology was influenced by David Sharp. He received a master's degree in 1902.

Maxwell Lefroy briefly served as assistant master at Seaford College, and then joined as an entomologist in Barbados from 1899. Before he left Barbados he got engaged to Kathleen Hamilton O'Meara, daughter of a former Provost Marshal in British Guiana from a Catholic family, leading to some disapproval from his mother and sister. His entomological work in this period was published in the form of several bulletins. In October 1908 he accepted permanent employment with the Government of India. Maxwell Lefroy convened a series of meetings on an all India basis, to bring together all the entomologists of the country. From 1915, five such meetings were held at the Imperial Agricultural Research Institute, and these formed the foundation of entomological knowledge in India. He was succeeded in the position of Imperial Entomologist by T. Bainbrigge Fletcher. Maxwell Lefroy's approaches to agricultural pest management was principally aimed at being practical and low cost, often advocating cultural practices such as the removal and burning of crops material that may harbour pupating pests. He published Indian Insect Life, a summary of the major insects of economic importance in 1906, in association with Frank Milburn Howlett. On 10 November 1910 their son Denis Charles died, possibly from typhoid, dysentery or some other fly borne disease and the other son Cecil was immediately sent away to safety in Darjeeling to be taken care of at the Loreto Convent. The death led to his taking leave and returning to England the next year. His son Cecil was also accompanied by his Indian ayah Elizabeth. He took privilege leave from January 1911 for three months and then extended it by going on furlough. Among his last works in India was an analysis of the role of birds in agriculture, written along with supernumerary entomologist Charles W. Mason. The study, begun in 1907, involved analysis of the gut contents of 1325 specimens of birds shot in agricultural fields. He gave lectures in England and he was appointed a lecturer at the Imperial College on 1 September 1911. He applied for resignation from his Indian government posting. He returned to Pusa on 29 July 1912 and an offer was made to retain him but he decided instead to take up a position at the Imperial College as professor of entomology. His resignation was formally accepted on 15 December 1912. Maxwell Lefroy moved to live initially in Strawberry Hill, and later Acton Lodge in Isleworth close to his workplace in South Kensington. In the early days, he used a motorbike with a sidecar to travel about. In 1913 1914, Lefroy was consulted by Frank Baines, Principal Architect of the Office of Works, to study ways of exterminating death watch beetles that had been found in Westminster Hall, beside England's Houses of Parliament. He began to try out various chemicals and finally came up with a 50% dichlorobenzene, 47% mineral oil and 3% barium oleate mixture to brush the wood with. This treatment was used by Baines who was then knighted for saving Westminster Hall. During the First World War, Maxwell Lefroy volunteered but was rejected on medical grounds from military service. In 1915 he took up a position travelling across India as Imperial silk specialist. Along with E. C. Ansorge, magistrate and collector in Bihar and Orissa; and an amateur entomologist, he wrote a Report on an Inquiry into the Silk Industry in India (1917) in three volumes but not without a major interruption. He also introduced a treatment for the control of lice in the trenches called that kept away jigger fleas and ticks. It was reported that there was a fall of 66% in cases of dysentery, cholera and typhoid after his measures were put in place. A bout of beri beri invalided him and he returned to India, recovered and then travelled to England. Shortly after, there was a problem with weevils infesting wheat in Australia which hampered food supplies during the war. In October 1917 he sailed to San Francisco and then to Sydney where he examined the wheat weevil problem along with W. W. Froggatt, the Government entomologist and suggested various measures. He also examined the issue of sheep blowflies Lucilia sericata before setting off from Sydney to England in May 1919. He was buried in Kensal Green cemetery. His position at the Imperial College was taken up by Balfour Browne who ensured that the flasks with unknown chemicals that Maxwell Lefroy was working with were buried.