So far, then, as mechanical science goes I am inclined to think the coming period will be, from the point of view of the common man, almost without sensational interest. There will be an immense amount of enrichment and filling-in, but of the sort that does not get prominently into the daily papers. At every point there will be economies and simplifications of method, discoveries of new artificial substances with new capabilities, and of new methods of utilising power. There will be a progressive change in the apparatus and quality of human life—the sort of alteration of the percentages that causes no intellectual shock. Electric heating, for example, will become practicable in our houses, and then cheaper, and at last so cheap and good that nobody will burn coal any more. Little electric contrivances will dispense with menial service in more and more directions. The builder will introduce new, more convenient, healthier and prettier substances, and the young architect will become increasingly the intelligent student of novelty. The steam engine, the coal yard, and the tall chimney, and indeed all chimneys, will vanish quietly from our urban landscape. The speeding up and cheapening of travel, and the increase in its swiftness and comfort, will go on steadily—widening experience. A more systematic and understanding social science will be estimating the probable growth and movement of population, and planning town and country on lines that would seem to-day almost inconceivably wise and generous. All this means a quiet broadening and aeration and beautifying of life. Utopian requirements, so far as the material side of things goes, will be executed and delivered with at last the utmost promptness.... It is in quite other directions that the scientific achievements to astonish our children will probably be achieved. Progress never appears to be uniform in human affairs. There are intricate correlations between department and department. One field must mark time until another can come up to it with results sufficiently arranged and conclusions sufficiently simplified for application. Medicine waits on organic chemistry, geology on mineralogy, and both on the chemistry of high pressures and temperature. And subtle variations in method and the prevailing mental temperament of the type of writer engaged, produce remarkable differences in the quality and quantity of the stated result. Moreover, there are in the history of every scientific province periods of seed-time, when there is great activity without immediate apparent fruition, and periods, as, for example, the last two decades of electrical application, of prolific realisation. It is highly probable that the physiologist and the organic chemist are working towards co-operations that may make the physician’s sphere the new scientific wonderland.