Haeckel, the distinguished scientist, in his endeavor to prove that Man's senses are but a development of something in inorganic life, has called our attention to the fact that Molecules, and Atoms, are capable of "receiving" sensations and "responding" thereto. He makes quite a point of this in his latest works, and remarks, among many other things showing his positive views on the subject of "sensation in the inorganic world": "_I cannot imagine the simplest chemical and physical process without attributing the movements of the material particles to unconscious sensation_"; and again: "_The idea of chemical affinity consists in the fact that the various chemical elements perceive the qualitative differences in other elements--experience 'pleasure' or 'revulsion' at contact with them, and execute specific movements on this ground_." He also quotes, approvingly, the remarks of Nageli, who said: "_If the molecules possess something that is related, however distantly, to sensation, it must be comfortable to be able to follow their attractions and repulsions; uncomfortable when they are forced to do otherwise_." Haeckel also says that in his opinion _the sensations in animal and plant life are "connected by a long series of evolutionary stages with the simpler forms of sensation that we find in the inorganic elements, and that reveal themselves in chemical affinity_." Is not this strong enough? Perhaps we may now be permitted at least to "assume" that even the Atoms, Molecules and Corpuscles have "something like sensation." Some one may now object that Haeckel speaks of "contact" between the particles, and that sensation by contact (even in an atom) is far different from sensation without contact, at a short distance. Quite right, but if the objector will take the trouble to review the teachings of Science regarding the relation of the Particles, he will see that the Particles are _never "exactly" in contact_, except in moments of collision, which, by the way, they carefully avoid. The Corpuscles, as we have shown, have _"plenty of room" in which to move about_, and they move in orbits around each other. The Atoms combine, _but there is always room between them_, as may be seen by reference to the teachings regarding the "Ether," which "fills up the cracks" according to the theory. And the Molecules _also have "plenty of room,"_ as may be seen by reference to that part of the subject, particularly to the comparison of the drop of water magnified to the size of the Earth, in which the Molecules would appear about the size of the original drop _with more room between each than their own size_.