Pepys, William Hasledine, 1775-1856. Man of science.

William Hasledine Pepys was born the son of W H Pepys, cutler and maker of surgical instruments, in London, in 1775. His educational background is not known. In 1796 he founded the Askesian Society, which led to the foundation of the British Mineralogical Society, the Geological Society and the London Institution, in Finsbury Square, London. He was an original manager of the London Institution and was Honorary Secretary from 1821 to 1824. He became the Treasurer and Vice-President of the Geological Society. He worked on soda-water apparatus in 1798 and also researched into using mercury contacts for electrical apparatus and tubes coated in India rubber to convey gases, inventing the mercury gasometer as a result. In 1807 he invented a type of eudiometer, and in 1808 he was elected Fellow of the Royal Society. He extended his father's business into making instruments for the philosophical discipline. He was active in the management of the Royal Institution of Great Britain (RI) and was its Vice-President in 1816. He published papers of his work in Philosophical Transactions of the Royal Society, and in Philosophical Magazine with William Allen (1770-1843). He was a Quaker and he died in Kensington, London in 1856.