17 JANUARY 1891, Page 25

Theory of Physics. By Camilo Calloja. (Kogan Paul and Co.)

—This is a rectification, the author tells us, of the theories of molar mechanics, heat, chemistry, sound, light, and electricity. The three last ho calls " progenic physics," progene being the name given by him to imponderable ether. With this theory of progenic physics he attacks the current ideas on sound, light, and electricity, declaring light to be the " progressive or trans- latory radiation of progeno," and so on with boat, chemistry, electricity, and sound, which is an " oscillatory " movement of progene. The theory of the spectrum and the refrangibility of rays is all wrong; white light is not complex, but really the simplest form. " The antecedent for the cause of the orbital and rotatory movements of the earth" is to be found in the "move- ments of progene determined by the functional opposition of the two living kingdoms ;" the direction of the magnetic needle is also determined by their want of equilibrium i . We are reminded faintly of some gentleman (Mr. Grant Allen P) who said we were originally undulations of carbonic acid. Camilo Calleja is a little too aggressive in his treatment of the subject, and he must expound his ideas with rather more clearness. Meanwhile, wo commend his theory of light as something with which to amuse the physicist.