The thermal zones of the Earth according to the duration of hot, moderate and cold periods and to the impact of heat on the organic world

This is the translated and edited version of the paper "Die Warmezonen der Erde, nach der Dauer der heissen, gemassigten und kalten Zeit und nach der Wirkung der Warme auf die organische Welt betrachtet" by W. Koppen, which originally appeared in 1884 in the Meteorologische Zeitschrift. Superscript numbers indicate original footnotes (translated at the bottom of the page), E ... numbers indicate editorial endnotes (at the end of the article), square brackets [] indicate editorial comments in the text.