Letter from James Clerk Maxwell, on two papers 'On the effect of heat on the chloride, bromide, and iodide of silver' and 'On the effects of heat on some chloro-brom-iodides of silver' by G F Rodwell to the Secretary of the Royal Society Has read Foster's letter and now believes the paper shouldn't be published in Philosophical Transactions. It should be published in Proceedings, although a 'good deal would have to be cut out to make it fit'. Subject: Physics [Both papers published in Proceedings of the Royal Society, 1876]. 19 June 1876