THE very important letter of Dr. Aston in NATURE of December 18, 1919, gives much evidence in favour of a theory of the structure and composition of the nuclei of complex atoms as published by me five ...

When used as a chemical weapon, chlorine gas disperses so rapidly that evidence of its release can be hard to find. “With most nerve agents, we have biomarkers that are stable in the environment that ...

Introduction / Hasok Chang and Catherine Jackson -- Part A. Chlorine and the theory of matter -- The discovery of chlorine : a window on the chemical revolution / Ruth Ashbee -- The elementary nature ...

I HAVE read Prof. Harkins's letter with great interest. If Prof. Harkins has succeeded in separating the isotopic hydrochloric acids he is certainly to be congratulated. The very meagre positive ...