DOI Page / Citation link:
https://doi.org/10.11588/diglit.62828#0070
( )
repeat it on the line C D, firft a fillet, then a flute, till you have
the propofed number, which in this cafe is 5, (and always in
pilafters fhould be an odd number *.)
Second, Extend your compares from c to d, the whole fpace
which the uncertain diviiions include; and with one foot on
r or d, turn the arches Ec and E^Z, and from the point, where
thefe two arches interfedf as at E, draw right lines to c and d,
which will then form an equilateral triangle.
Laftly, Draw lines from all the divifions on C D to E the
angular point. After which, take A B in the compares and turn
the arch e d, and through the two fedtions e d draw a right line,
then/will e d be equal A B, and the pilafter or frieze will be
xU^<hd^i»Athe moft accurate manner as required..
Problem III. Fig. 3.
To raife a perpendicular from any given point on a line as
ry-f
its bafe.
* Obferve, any opening of one pair of compafies will do the whole bufinefs, if a pre-
vious calculation be made of the equal parts contained in all the flutes and fillets. Thus, in.
the prefent cafe, we fay there are five flutes, allowing the fpace of tnree fillets to a flute,
which make together fifteen ; and the addition of fix, the number of fillets in the pillafier,
make twenty-one.. Therefore lay on the compafies at random twenty-one times, and pro-
ceed as above.
Operation
repeat it on the line C D, firft a fillet, then a flute, till you have
the propofed number, which in this cafe is 5, (and always in
pilafters fhould be an odd number *.)
Second, Extend your compares from c to d, the whole fpace
which the uncertain diviiions include; and with one foot on
r or d, turn the arches Ec and E^Z, and from the point, where
thefe two arches interfedf as at E, draw right lines to c and d,
which will then form an equilateral triangle.
Laftly, Draw lines from all the divifions on C D to E the
angular point. After which, take A B in the compares and turn
the arch e d, and through the two fedtions e d draw a right line,
then/will e d be equal A B, and the pilafter or frieze will be
xU^<hd^i»Athe moft accurate manner as required..
Problem III. Fig. 3.
To raife a perpendicular from any given point on a line as
ry-f
its bafe.
* Obferve, any opening of one pair of compafies will do the whole bufinefs, if a pre-
vious calculation be made of the equal parts contained in all the flutes and fillets. Thus, in.
the prefent cafe, we fay there are five flutes, allowing the fpace of tnree fillets to a flute,
which make together fifteen ; and the addition of fix, the number of fillets in the pillafier,
make twenty-one.. Therefore lay on the compafies at random twenty-one times, and pro-
ceed as above.
Operation