EQUAL TEMPERAMENT
how many cents each interval misses the pure one by, and why exactly that much
AMP MIC POSITIONS
where to place a mic in front of a guitar cab and how each spot sounds — after the Shure chart
ACOUSTIC BODY SHAPES
what each one was made for · from the front room to the stage, at true scale
NOTES ON THE FRETBOARD
standard tuning E A D G B e · first twelve frets
STRING MATERIALS
what they are drawn from, how one wrap differs from another and what of that is audible
TONEWOODS
density, hardness, export · what is measured kept apart from what is taste
MICROPHONE TYPES
what picks the sound up and where it stays deaf — five patterns from one formula
THE SEVEN MUSICAL MODES
the same white keys · a different root
NOTE VALUES
from whole to thirty-second · how many fit a 4/4 bar
DADGAD
D — A — D — G — A — D
DROP D
one string down · everything else unchanged
HALF STEP DOWN
every string down a semitone · same shapes
OPEN C
the deepest of the open tunings
OPEN D
the open strings are already D major
OPEN G
the open strings are already G major
UKULELE CHORDS
the first twelve chords · standard tuning G C E A
RED CABBAGE pH INDICATOR
the purple juice that changes colour: acid or base, without asking a book
THE COMPASS ROSE
the sixteen compass points with exact bearings: four cardinal, four intercardinal, eight in between
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
USDA HARDINESS ZONES
the 13 zones by average annual extreme minimum — each range in °F and °C, with the a and b half-zones
THE MOMENT MAGNITUDE SCALE
what a single step hides: ×10 in recorded amplitude and roughly ×32 in released energy — drawn to true scale
BASIC PHYSICS FORMULAS
fifteen formulas · every letter explained beneath it
PLASTIC RESIN CODES
the seven codes on the bottom of an article per ASTM D7611: which resin each number names and what it means for sorting