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 does not make it less interesting.

Henry Moseley

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 when it meets an atom collect up all its energy from all round and concentrate it on the atom.

Henry Moseley

The chief result is that all the elements give the same kind of spectrum, the result for any metal being quite easy to guess from the results for the others.

Henry Moseley

We find that an X ray bulb with a platinum target gives out a sharp line spectrum of five wavelengths which the crystal separates out as if it were a diffraction grating.

Henry Moseley

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.

Henry Moseley

This quantity can only be the charge on the central positive nucleus, of the existence of which we already have definite proof.

Henry Moseley

In this way one can get pure monochromatic X rays. Tomorrow we search for the spectra of other elements. There is here a whole new branch of spectroscopy, which is sure to tell one much about the nature of an atom.

Henry Moseley

It is as if when a circular wave on water met an obstacle, the wave were all suddenly to travel round the circle and disappear all round and concentrate its energy on attacking the obstacle.

Henry Moseley

This shews that the insides of all the atoms are very much alike, and from these results it will be possible to find out something of what the insides are made up of.

Henry Moseley

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 spectrum.

Henry Moseley

Mechanically of course this is absurd, but mechanics have in this direction been for some time a broken reed.

Henry Moseley