DOI Page / Citation link:
https://doi.org/10.11588/diglit.18825#0103
LECT. IV,]
91
PRINCIPLES OF PROPORTION,
PLATE II.
1. Draw truly by the eye, the part of a circle A. B.
2. Draw truly by the eye, the part of a circle
C. D. reverse from the former.
3. Draw truly by the eye the waving line E. F.
4. Draw truly by the eye the waving line G. H„
5. Draw also C. B.
6. Draw also A. D.
To determine whether the copy be correct:—
OBSERVE
The center of A B. is at F. from that, or from a
Corresponding distance, sweep the arc A. B.
The center of C. D. is at E. from which, to
determine its truth, sweep C. D.
The centers of E. F. are, the upper one at C. which
sweeps from C. to the middle, or half, of C. B : the
lower center is at F. which sweeps from the middle,
or half, of C. B. to B.
PRIN-
91
PRINCIPLES OF PROPORTION,
PLATE II.
1. Draw truly by the eye, the part of a circle A. B.
2. Draw truly by the eye, the part of a circle
C. D. reverse from the former.
3. Draw truly by the eye the waving line E. F.
4. Draw truly by the eye the waving line G. H„
5. Draw also C. B.
6. Draw also A. D.
To determine whether the copy be correct:—
OBSERVE
The center of A B. is at F. from that, or from a
Corresponding distance, sweep the arc A. B.
The center of C. D. is at E. from which, to
determine its truth, sweep C. D.
The centers of E. F. are, the upper one at C. which
sweeps from C. to the middle, or half, of C. B : the
lower center is at F. which sweeps from the middle,
or half, of C. B. to B.
PRIN-