EditorialViwe of a model, showing the curves generated (experimentally) by the motion of a viscous fluid, Glacier Model, p. 379, 1843, James David Forbes: Travels through the alps of Savoy and other parts of the Pennine Chain with observations of the phenomena ...
EditorialGlobules of molten rock (pyroclastics) whose size equals or exceeds 64 mm in diameter. They form when a volcano expels viscous fragments of lava during an eruption. Greece. Museum fur Naturkunde. Berlin. Germany. Europe.