PHOTO PRINT SIZES
how many millimetres each size really is, and how much of the frame goes under the knife
US$1.50
SI BASE UNITS
seven constants given an exact number — and the seven units that follow from them
US$1.50
SI DERIVED UNITS
twenty-two with names of their own — and what each one is made of
US$1.50
SI PREFIXES
from quetta to quecto · twenty multipliers
US$1.50
THE AMERICAN WIRE GAUGE
forty-four sizes derived from two diameters and one law of progression
US$1.50