THE BEAUFORT SCALE
thirteen forces of wind — from water like a mirror to a wave of fourteen metres
US$2.50
THE EIGHT BLOOD TYPES
three antigens, eight types — and the one rule the whole table of compatibility follows from
US$2.50
COLOUR GAMUTS
sRGB, Display P3, Rec. 2020 and ProPhoto RGB on the CIE 1931 chromaticity diagram
US$2.50
TORQUE
why the same dumbbell grows heavier as the arm rises, and how to work it out in advance
US$2.50