along. Herbert Spencer, Jowett, and Robert Leslie Ellis understood, I feel sure; and a few others, but nearly all the logicians and mathematicians ignored [953] the statement that the book was meant to throw light on the nature of the human mind; and treated the formula entirely as a wonderful new method of reducing to logical order masses of evidence about external fact. Mary Boole claimed that there was profound influence – via her uncle George Everest – of Indian thought in general and Indian logic, in particular, on George Boole, as well as on Augustus De Morgan and Charles Babbage: Think what must have been the effect of the intense Hinduizing of three such men as Babbage, De Morgan, and George Boole on the mathematical atmosphere of 1830–65. What share had it in generating the Vector Analysis and the mathematics by which investigations in physical science are now conducted? Boole maintained that: Family In 1855, Boole married Mary Everest (niece of George Everest), who later wrote several educational works on her husband's principles. The Booles had five daughters: Mary Ellen (1856–1908) who married the mathematician and author Charles Howard Hinton and had four children: George (1882–1943), Eric (*1884), William (1886–1909) and Sebastian (1887–1923), inventor of the Jungle gym. After the sudden death of her husband, Mary Ellen committed suicide in Washington, D.C. in May 1908. Sebastian had three children: Jean Hinton (married name Rosner) (1917–2002), a peace activist. William H. Hinton (1919–2004) visited China in the 1930s and 40s and wrote an influential account of the Communist land reform. Joan Hinton (1921–2010) worked for the Manhattan Project and lived in China from 1948 until her death on 8 June 2010; she was married to Sid Engst. Margaret (1858–1935), married Edward Ingram Taylor, an artist. Their elder son Geoffrey Ingram Taylor became a mathematician and a Fellow of the Royal Society. Their younger son Julian Taylor was a professor of surgery. Alicia (1860–1940), who made important contributions to four-dimensional geometry. Her son Leonard Stott, a medical doctor and tuberculosis pioneer, invented a portable X-ray machine, a pneumothorax apparatus, and system of navigation based on spherical coordinates. Lucy Everest (1862–1904), who was the first female professor of chemistry in England. Ethel Lilian (1864–1960), who married the Polish scientist and revolutionary Wilfrid Michael Voynich and was the author of the novel The Gadfly. See also Concepts Boolean algebra, a logical calculus of