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What thought remains on which to hang the imagination of an a independent of the acknowledged forces? Like Boscovich, he abolishes the atom, and puts a 'centre of force' in its place. With his usual courage and sincerity he pushes his view to its utmost consequences.
Curiously enough, we shall find that the latest theories as to the final term of the series are not so very far afield from the dreamings of the eighteenth-century philosophers; the electron of J. J. Thompson shows many points of resemblance to the formless centre of Boscovich.
BOSCOVICH. This is not a very striking telescopic object under any phase, on account of its broken, irregular, and generally ill-defined border. It is, however, remarkable as being one of the darkest spots on the visible surface: in this respect a fit companion to Julius Caesar, its neighbour on the W. Schmidt shows some ridges within it.
Newton's theory of ultimate atoms; Leibnitz's doctrine of monads; and the dynamic theory of Boscovich, which makes matter mere centres of force, are all dismissed as unthinkable. It is not very clear in what sense that word is to be taken.
In the course of his reading for his "History of Discoveries relating to Vision, Light, and Colours," he had come upon the speculations of Boscovich and Michell, and had been led to admit the sufficiently obvious truth that our knowledge of matter is a knowledge of its properties; and that of its substance if it have a substance we know nothing.
The one-sided man is always an imperfect man; and an imperfect man as a teacher of perfection is a dangerous teacher for young generations. Two Slavs, Nicolaus Copernicus, from Thorn, and Ruggiero Boscovich, from Ragusa, both Roman Catholic priests, were at the same time both ardent scientists. Copernicus postulated the heliocentric planetary system instead of the geocentric.
A considerable crowd of people gathered round, and were not a little struck by this singular appearance. He spoke Latin with wonderful fluency and elegance. When Pere Boscovich was in England, Johnson dined in company with him at Sir Joshua Reynolds's, and at Dr. Douglas's, now Bishop of Salisbury.
We may feel very sure indeed, therefore, that the molecules of matter are not the unextended, formless points which Boscovich and his followers of the eighteenth century thought them. But all this, it must be borne in mind, refers to the molecule, not to the ultimate particle of matter, about which we shall have more to say in another connection.
And in fact, unless we are satisfied to imagine the atoms of a gas as mathematical points endowed with inertia, and as, according to Boscovich, endowed with forces of mutual, positive, and negative attraction, varying according to some definite function of the distance, we cannot avoid the question of impacts, and of vibrations and rotations of the molecules resulting from impacts, and we must look distinctly on each molecule as being either a little elastic solid or a configuration of motion in a continuous all-pervading liquid.
In a speculative way he had thought out more or less tenable conceptions as to the ultimate nature of matter, as witness the theories of Leibnitz and Boscovich and Davy, to which we may recur. But he had not as yet conceived the notion of a distinction between matter and energy, which is so fundamental to the physics of a later epoch.
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