The SciencesDecember 1, 1917
An attempt to separate the Isotopic Forms of Lead by Fractional Crystallization
Stories by Theodore W. Richards
The SciencesJune 23, 1917
Further Study of the Atomic Weight of Lead of Radioactive Origin
The SciencesAugust 26, 1916
The Elements
What They Are; Their Fundamental Attributes, and the Atomic Theory
The SciencesSeptember 12, 1914
Theory of Compressible Atoms