Arnulph Henry Reginald Mallock, FRS (12 March 1851 – 26 June 1933) was a British scientific instrument designer and experimentalist. He was born in

Cheriton Bishop Cheriton Bishop is a village and civil parish situated on the northern borders of Dartmoor National park between Exeter and Okehampton, in Devon, England. The population at the United Kingdom Census 2011, 2011 Census was 652. The history of the ...

, Devon the son of the Revd. William and Margaret (née Froude) Mallock. His father was Rector of

. He was educated at home and then from the age of 11 to 16 at a school in

Harlow, Essex Harlow is a large town and local government district located in the west of Essex, England. Founded as a new town, it is situated on the border with Hertfordshire and London, Harlow occupies a large area of land on the south bank of the upper ...

. After a further period of private tutoring he went up to St Edmund's Hall, Oxford. After a few years assisting his uncle,

William Froude William Froude (; 28 November 1810 in Devon – 4 May 1879 in Simonstown, South Africa) was an English engineer, hydrodynamicist and naval architect. He was the first to formulate reliable laws for the resistance that water offers to ships (suc ...

, a naval architect, to build the first ship test tank he went to work for four months with

Lord Rayleigh John William Strutt, 3rd Baron Rayleigh, (; 12 November 1842 – 30 June 1919) was an English mathematician and physicist who made extensive contributions to science. He spent all of his academic career at the University of Cambridge. Amo ...

as an experimental assistant. His interests and projects were manifold. The military and the Railway Companies constantly sought his help. Amongst many other commissions he designed equipment to measure earth tremors caused by railways, slight movements in

St Paul's cathedral St Paul's Cathedral is an Anglican cathedral in London and is the seat of the Bishop of London. The cathedral serves as the mother church of the Diocese of London. It is on Ludgate Hill at the highest point of the City of London and is a Grad ...

and several bridges. He was a civilian member of the Ordnance Committee and tackled many problems of ballistics and the design of ordnance. He was elected a

Fellow of the Royal Society Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the judges of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural science, natural knowledge, incl ...

in 1903. His candidature citation read: "''Consulting Engineer. An original investigator and experimentalist in various branches of physical science, who has invented and improved many instruments of high scientific value. Author of the following papers: 'Measurement of a Body under Strain' (Proc Roy Soc, No 197, 1879); 'Action of Cutting Tools' (ibid No 217, 1881); 'Shape of Drilled Holes' (ibid, No 226, 1883); 'Viscosity of water' (ibid, vol 45, 1888); 'Properties of Indian Rubber' (ibid, vol 46, 1889); 'Young's Modulus for Crystals' (ibid, vol 49, 1891); 'Instability of Distended Tubes' (ibid); 'Insect Sight' (ibid, vol 55, 1893). Experiments on 'Fluid Viscosity' (Phil Trans, vol 187(A), 1896). Also of Papers published in Reports, Brit Assoc; Trans Inst Nav Arch; and other Scientific Journals, &c.''" A supplementary citation read: "''The skill and insight exhibited by Mr Mallock in work done for the Vibration Committee appointed about two years ago by the Board of Trade was acknowledged in highly laudatory terms in the Report of the Committee''. In 1907, he published a paper on what would later be known as the von Karman vortex street.A. Mallock, 1907: On the resistance of air. ''Proc. Royal Soc''., A79, pp. 262–265. He served on the Council of the Royal Society from 1910-1912. In 1904 he married Helena Maria Caroline Finlay of Castle Toward. After his death his widow presented the Royal Society with the sextant that had belonged to Brunel

References

{{DEFAULTSORT:Mallock, Arnulph 1851 births 1933 deaths People from Teignbridge (district) Fellows of the Royal Society Presidents of the Smeatonian Society of Civil Engineers