During his tenure of the chair continued to publish many important works such as his collaborative work with William Fowler, Nuclear cosmochronology published in 1960 in the Annals of Physics which described how the observed ratios of the abundance of different isotopes of uranium and thorium can be used to determine a cosmical time-scale.
Sa panahon ng kanyang pagmamay-ari ng upuan sa patuloy na mag-publish ng maraming mahalagang mga gawa tulad ng kanyang Tulungang trabaho sa William Fowler, Nuclear cosmochronology inilathala sa 1960 sa Annals ng Physics na inilarawan kung paano ang napagmasdan ratios ng abundance ng iba't-ibang at isotopes ng uraniyum toriyum ay maaaring gamitin upang matukoy ang isang cosmical time-scale.