Scientific papers : physics, chemistry, astronomy, geology.
Gravitation.
Cohesion.
Chemical affinity.
Magnetism.
Electricity.
Physics.
Chemistry.
Astronomy.
Geology.
Helmholtz, Hermann von, 1821-1894.
Kelvin, William Thomson, Baron, 1824-1907.
Newcomb, Simon, 1835-1909.
Geikie, Archibald, Sir, 1835-1924.
Eliot, Charles W.