Axial tilt, [34], [36], [55], [155], [161];
determinations of, [34], [36], [155];
determines character of seasons, [34], [36];
effect of, on presentation of arctic and antarctic regions, [70];
effect of, on temperature of arctic and temperate regions, [88].
Bacteria, plasm-eating beings, [353].
Barometric pressure, [63], [85].
Bilateralism, [208];