James Croll (1821-1890) was a Scottish scientist who developed an astronomical theory of climate change 60 years before Milutin Milankovitch published a very similar theory. He was employed as a janitor at the Andersonian College and Museum in Glasgow from 1859 until 1867, after which he joined the British Geological Survey.

Biographical Notice of James Croll
James Croll’s 1866 paper
James Croll’s connections with the Geological Society of Glasgow