.nr _0 \n(c.
.de ac
.nr hm 0
.nr tm 0
.rm $h
.ll 8.9i
.pl 15i
.nr $s 0.5i
.if !\\n($T \
.	po 1.0i
.nr bm 3i
.nr fm 0.9i
.de $f ..
.ti 0
\h'|0.5i'\\\\n%\h'|1.25i'\\$2\h'|3i'\\$1
.br
...
.bp
.rs
.sp 0.75i
.rm ac
..
.if t .tm Line \n(c. -- macro .ac will not work in TROFF -- request ignored.
.if t .rm ac
.de +c			\" *** begin chapter
.if \\n(?A \
\{\
.	nr ch 0 1
.	pn 1
.	ep
.	af % 1
.	bp
.\}
.nr ?A 0
.sp 1i
.if \\n(.$ \
.	$c "\\$1"
..
.nr c. \n(_0
