DROP D
one string down · everything else unchanged
Free
HALF STEP DOWN
every string down a semitone · same shapes
Free
OPEN C
the deepest of the open tunings
Free
OPEN D
the open strings are already D major
Free
OPEN G
the open strings are already G major
Free
THE EIGHT BLOOD TYPES
three antigens, eight types — and the one rule the whole table of compatibility follows from
US$2.50
THE TEN CLOUD GENERA
three levels of the troposphere to one scale, and the ten genera that live in them
US$1.50
THE COMPASS ROSE
the sixteen compass points with exact bearings: four cardinal, four intercardinal, eight in between
Free
TN, VA, IPS AND OLED
what differs inside the cell · and a paper describing each mode
US$1.50
MAMMALS IN TIME
from the first synapsid to us · 320 million years on one axis
Free
VERTEBRATES IN TIME
when each group appeared · five hundred million years on one axis
Free
GREEK LETTERS IN SCIENCE
10 capitals with a shape of their own, 14 twins of Latin letters, and what each one stands for
US$1.50