Full title: 'Soap Bubbles and the Forces which Mould Them, Being a Course of Three Lectures delivered in the Theatre of the London Institution on the Afternoons of Dec. 30, 1889, Jan. 1 and 3, 1890, before a Juvenile Audience'. Romance of Science Series. A very rare 1st edition dating from the same year as Boys' last lecture in this series and not the later edition published in 1895 which is available elsewhere. Fine black and white illustrations throughout. Some wear to cover and spine. Gold embossed lettering to spine and front cover. A few pages have the corner torn off. Otherwise a clean copy. Sir Charles Vernon Boys, F.R.S.,(1855 – 1944) was a British physicist, known for his innovative experimental work. Amongst his achievements was the invention of the fused quartz fibre torsion balance which he used to build a radiomicrometer, a device for astronomical observation. In 1897 Boys became a Metropolitan Gas Referee, charged with assessing a fair price for coal gas. As heating grew to become the principal use of coal gas, Boys undertook fundamental work on calorimetry to measure and record the heat content of the gas, achieving a substantial increase in precision of measurement. At this time the national gas bill for the United Kingdom was fifty million pounds, so a one-percent correction to the bill represented a very significant amount of money. Boys also worked on high-speed photography of lightning and bullets in flight, and conducted public lectures on the properties of soap films, which were gathered into 'Soap Bubbles: Their Colours and the Forces Which Mould Them', a classic of scientific popularization. The first edition of 'Soap Bubbles' appeared in 1890 and the title has remained in print to this day. The book deeply impressed French writer Alfred Jarry, who in 1898 wrote the absurdist novel 'Exploits and Opinions of Dr. Faustroll, Pataphysician', in which the title character, who was born at the age of 63 and sails in a sieve, is described as a friend of C.V. Boys. 'Soap Bubbles' was also a favourite of American poet, Elizabeth Bishop. Boys was an assistant professor at the Royal College of Science (now Imperial College London) in South Kensington from 1889 to 1897, as well as an examiner at the University of London. In 1899 he presented the Royal Institution Christmas Lectures. He was elected to the Royal Society in 1888 and knighted in 1935. He was awarded the Royal Medal in 1896 and the Rumford Medal in 1924. He was awarded the Elliott Cresson Medal in 1939.