1903 introductions

printing technique where an inked image is transferred from plate to printing surface via a rubber blanket

Latin-based international auxiliary language

semi-automatic pistol

thumb|200px|right|A low quality toy spinthariscope taken from a 1950s Chemcraft brand "Atomic energy" chemistry experimentation set thumb|A spinthariscope crafted by Robert Drosten in Belgium in 1905 and used in the University of Mons Faculty of Engineering ("Polytech Mons") at the beginning of the 20th century. A spinthariscope () is a device for observing individual nuclear disintegrations caused by the interaction of ionizing radiation with a phosphor (see radioluminescence) or scintillator.

personal identity less known to a public than another identity or persona

law of parsimony in comparative (animal) psychology

standard system for referencing the works of the pre-Socratic philosophers

licence plates of Ontario, Canada