Referee's report by William Thomson, 1st Baron Kelvin, on the Bakerian Lecture 'On the viscosity or internal friction of air and other gases' by James Clerk Maxwell Recommended for publication in the 'Philosophical Transactions of the Royal Society'. Suggests the author should continue their investigations. Suggests work should also be undertaken by the government in this important area of investigation. Suggests the Royal Society should 'move the government in the establishment of laboratories for investigation, in which teaching would be thoroughly subordinate to the search for new knowledge of properties of matter'. Subject: Physics and Chemistry [Published in the Philosophical Transactions of the Royal Society] 11 April 1866