Boltwood

Boltwood Capital Management Cuts Holdings in Costco Wholesale Co.

Arthur Holmes establishes radiometric dating Although Boltwood published his paper in a prominent geological journal, the geological community had little interest in radioactivity.

Boltwood, B.B., 1907, On the ultimate disintegration products of the radio-active elements.

Boltwood focused on the end products of decay series.

Boltwood gave up work on radiometric dating and went on to investigate other decay series.

Boltwood refined his work and finally published the results in 1907.

Boltwood was inspired to describe the relationships between elements in various decay series.

Refinements in the technique would later give ages for Boltwood's 26 samples of 410 million to 2.2 billion years.

The pioneers of radioactivity were chemist Bertram B. Boltwood and the energetic Rutherford.

There, in the space of a few months, using extremely primitive apparatus, Hahn discovered mesothorium I, mesothorium II, and – independently from Bertram Boltwood – the mother substance of radium, ionium (later identified as thorium-230).