PHASES OF THE MOON
eight phases · a full cycle of 29.53 days
$1.50
THE SOLAR SYSTEM
eight planets · size, distance, year and day
Free
THE HAMBURGER
the ratios of the mince and the five steps that decide the result
$1.50
NEAPOLITAN PIZZA DOUGH
four ingredients in the proportions written into an EU regulation
Free
POUND CAKE
four equal weights — a recipe whose name is its ratio
Free
PROTEIN IN FOODS
grams per 100 g · animal and plant · and the state each one was weighed in
Free