1904 in science

device that controls electric current between electrodes in an evacuated container

scientific model of the atom first proposed by J. J. Thomson in 1904

Astronomical instrument used to measure movements or variations in the brightness of celestial objects

expedition to the Antarctic in 1902-04

failed polar expedition between 1903-1905

overview of natural science-related events during the year of 1904

solar eclipse

20th-century annular solar eclipse