1waxed margin through the first semi-circular
line, and reaching to the second,
there proceed straight lines converging toward the centre of the hemicycle;
these mark the middles of intervening spaces lying between other straight lines
which extend to the fourth semi-circular line. But all lines whatsoever, from
the waxed margin up to the fourth line, whether they go beyond it or not,
correspond with the graduated lines which mark the minor spaces of a rod.
Those which go beyond the fourth line correspond with the lines marking
there proceed straight lines converging toward the centre of the hemicycle;
these mark the middles of intervening spaces lying between other straight lines
which extend to the fourth semi-circular line. But all lines whatsoever, from
the waxed margin up to the fourth line, whether they go beyond it or not,
correspond with the graduated lines which mark the minor spaces of a rod.
Those which go beyond the fourth line correspond with the lines marking
A—WAXED SEMICIRCLE OF THE HEMICYCLE. B—SEMICIRCULAR LINES.
C—STRAIGHT
LINES. D—LINE MEASURING THE HALF. E—LINE MEASURING THE WHOLE. F—TONGUE.
LINES. D—LINE MEASURING THE HALF. E—LINE MEASURING THE WHOLE. F—TONGUE.
zoom in
zoom out
zoom area
full page
page width
set mark
remove mark
get reference
digilib