WHAT A TORNADO BREAKS
twenty-eight damage indicators — and the wind at which each one gives way
US$1.50
BALLS BY THE RULES
eleven sports at true relative size — circumference, mass, pressure, and who sets them
Free
THE LARGEST COUNTRIES
the ten largest by surface area — as squares at true scale, each inside the next
US$1.50
PAPER SIZES
the A series · from A0 to A6
US$1.50
CAMERA SENSORS
seven sizes at one scale, with the crop factor computed from the diagonal
US$1.50
THE TALLEST BUILDINGS
the ten tallest at true scale — and where the floors in them end
Free
MOTORCYCLE CLASSES
rake, trail, wheelbase and seat height — six classes drawn at one scale
Free
PETROL AND DIESEL
nine lines of comparison, and in three of them the requirement is the same for both
US$1.50