Referee's report by Baden Powell, on a paper 'On the physics of media that are composed of free and perfectly elastic molecules in a state of motion' by John James Waterston Not recommended for publication in Philosophical Transactions. [This paper was eventually published in 1892, almost fifty years after these reports were made. The reason for this long delay is given in the abstract of the published paper - 'Most unfortunately the abstract printed at the time gave no adequate idea of the scope of the memoir, and still less of the nature of the results arrived at']. Subject: Physics [Published in Philosophical Transactions A, 1892]. [1846]