Atomic Weight Al 27'1 Sb 120'0 A 39'9 ... This is by no means a complete list of the uncertain elements, but only of those for which the data admit of slightly different interpretations.

The telluric screw plotted the atomic weights of the elements on the outside of a cylinder, so that one complete turn corresponded to an atomic weight increase of 16. As the diagram shows, this ...

"Neon, as has been already pointed out, consists of isotopic elements of atomic weights 20 and 22. The mass-spectra obtained when chlorine is present cannot be treated in detail here, but they ...