July 15 – F. W. Aston shows that the molar mass of chlorine (35.45) is a weighted average of the almost integral masses for the two isotopes35Cl and 37Cl.[4]
History of science and technology
Newcomen Society founded in the United Kingdom for the study of the history of engineering and technology.
Milutin Milanković proposes that long term climatic cycles may be due to changes in the eccentricity of the Earth's orbit and changes in the Earth's obliquity ("Milankovitch cycles").[6]