THE SOPRANO RECORDER
all 27 notes from C5 to D7 in the Baroque and German systems — and how to tell which one you hold
THE EIGHT BLOOD TYPES
three antigens, eight types — and the one rule the whole table of compatibility follows from
THE TEN CLOUD GENERA
three levels of the troposphere to one scale, and the ten genera that live in them
THE VERTICAL PLANET
from the Challenger Deep to the summit of Everest · one scale, nothing compressed
MAMMALS IN TIME
from the first synapsid to us · 320 million years on one axis
VERTEBRATES IN TIME
when each group appeared · five hundred million years on one axis
THE MOHS HARDNESS SCALE
ten reference minerals and five household probes: who scratches whom
THE PERIODIC TABLE
all 118 elements: symbol, atomic number and IUPAC atomic weight in every cell — blocks in colour, lanthanoids and actinoids offset below
BASIC PHYSICS FORMULAS
fifteen formulas · every letter explained beneath it
ROCK CLASSIFICATION
the three classes, 24 named rocks and the cycle that links them — after USGS and NPS
SPECTRAL LINES
five gases on one wavelength scale, from the violet edge to the red
ANIMALS
the main branches — from comb jellies to chordates · who is actually related to whom