Formulated first transformation incorporating local time t' = t - vx/c^2.

Goldstein discovers positive ion beams passing through perforated cathodes, founding mass spectrometry.

Henri Moissan isolates pure fluorine gas via low-temperature electrolysis of HF/KHF2.

Balmer formulates the empirical equation predicting visible hydrogen wavelengths (Balmer Series).

Dewar invents silvered double-walled vacuum insulation, enabling liquid gas storage and ultracold physics.

Formulated Balmer Series equation for visible hydrogen lines.

Boltzmann derives P = sigma T^4 theoretically combining Maxwell radiation pressure and Carnot cycles.

Submitted Uppsala dissertation establishing electrical conductivity of electrolytes.

Derived u(T) = a T^4 combining Maxwell radiation pressure and thermodynamics.