The whole subject of the X rays is opening out wonderfully, Bragg has of course got in ahead of us, and so the credit all belongs to him, but that do….

We have now got what seems to be definite proof that an X ray which spreads out in a spherical form from a source as a wave through the aether can wh….

In the last four days I have got the spectrum given by Tantalum, Chromium, Manganese, Iron, Nickel, Cobalt, and Copper and part of the Silver spectru….

We have here a proof that there is in the atom a fundamental quantity, which increases by regular steps as one passes from one element to the next. T….