At the meeting of 17th April we gave an account of some experiments made at the request of Professor Tait on the lowering of the maximum density point of water by pressure. We called the notice we gave of these experiments at that time preliminary, because we were anxious to perform further experiments to satisfy ourselves thoroughly of the correctness of the important conclusions then arrived at. We desire now to state that we have repeated these experiments with some slight improvements in experimental details, and at different temperatures, and are glad to state to the Society that our further experiments quite bear out the conclusions previously arrived at. The following will suffice to show the nature of any day's experiment. [For description of the apparatus used, &c, see ante, p. 626.]