Untersuchungen über die radioaktiven Substanzen von Marie Curie, übersetzt und mit Litteratur-Ergänzungen versehen von W. Kaufmann

The author presents a detailed report of laboratory investigations into naturally occurring radioactivity and newly discovered radioactive substances. A historical introduction precedes systematic chapters on the radioactivity of uranium and thorium, the isolation and chemical preparation of new elements including polonium and radium, and the determination of atomic weight and pure salts. Experimental methods and measurement techniques are described, including detection, intensity measurement, and radiographic applications. The work analyzes emission composition and energy, behavior in magnetic and electric fields, penetrating power, ionizing, thermal, chemical, and fluorescence effects. It also examines induced radioactivity, emanations, changes of activity with dissolution or heating, and offers theoretical interpretations of the phenomena.