ready by his nebular hypothesis proclaimed the origin and, by his discovery of the stoppage of the rotation of the earth through the tides, the destruction of the solar system. And finally, I could not undertake to construct the dialectical laws of nature but to discover them in it and to develop them from it.
To do this entirely and in each separate division is a colossal task. Not only is the ground to be covered almost immeasurable but on this entire ground natural science is involved in such tremendous changes that even those who have all their time to give can hardly keep up with it. Since the death of Marx however my mind has been occupied by more pressing duties and so I had to interrupt my work. I must, for the moment, confine myself to the hints in the work before us and wait for a later opportunity to correct and publish the results obtained, probably together with the most important manuscripts on mathematics left behind by Marx.
But the advance of theoretical science makes my work in all probability, in a great measure, or altogether, superfluous. Since the revolution which overturned theoretical science the necessity of arranging the accumulation of purely empirical discoveries has caused the opposing empiricists to pay more and more attention to the dialectical character of the operations of nature. The old stiff antagonisms, the sharp impassable frontier lines are becoming more and more abolished. Since the last "true" gases have been liquefied, since the proof that a body can be put in a condition in which liquid and gaseous forms cannot be differentiated, aggregate conditions have to the last remnant lost their earlier absolute character. With the statement of the kinetic theory of gases that, in gases, the squares of the speeds with which the separate gas molecules move are in inverse ratio
