'A Brief Account of An Experiment concerning Deafnesse' brought in by Dr William Holder Details about the middle ear - deaf patient could hear when a drum was beaten but was deaf when the drum stopped - belief that a person could hear if the tympanum was tense This paper sparked an intense controversy with John Wallis. Read to the Royal Society on 23 April 1668, Printed in 'Philosophical Transactions', vol 3, no 35, p 665 1668