The Birth-Time of the World and Other Scientific Essays

"The Birth-Time of the World and Other Scientific Essays" by John Joly is a collection of scientific essays written in the early 20th century. This work explores various topics within geology, mineralogy, and the scientific understanding of Earth's age and its processes, aiming to elucidate complex geological phenomena through established scientific principles. The opening of the collection introduces the first essay, "The Birth-Time of the World," which examines the origins and age of the Earth through a scientific lens. Joly reflects on historical perspectives from philosophers like Lucretius, contrasting them with current scientific approaches that suggest the Earth's formation is a gradual process without a definitive starting point. He discusses the significance of geological time in shaping our understanding of the universe and emphasizes the importance of sedimentation, denudation, and the evidence from terrestrial phenomena in estimating the age of Earth and its sediments. (This is an automatically generated summary.)

John Joly was an Irish geologist and physicist known for his development of radiotherapy in the treatment of cancer. He is also known for developing techniques to more accurately estimate the age of a geological period, based on radioactive elements present in minerals, the uranium–thorium dating.