Arctic current, effects of a stoppage of, [150]
Arctic plants in the southern hemisphere, [509]
Arctic regions, mild climates of, [181]
recent interglacial mild period in, [182]
Arctic warm climates of Secondary and Palæozoic times, [201]
Areas of distribution, [13]
separate and overlapping, [17], [28]
Ascension, former climate and productions of, [303]
Astronomical and geographical causes, comparative effects of, on climate, [207]
Astronomical causes of change of climate, [126]