Follow-up Comment #7, bug #42473 (project groff): I keep finding things. (I should probably stop and take a breath but this document dump of the "Unix 4.0" manuals is like a kid's Christmas for me.) I now think the filled-ness of the \(sq glyph in boldface was device-dependent.
Why? See the annotated table of contents for the aforementioned manuals. https://www.tuhs.org/Archive/Documentation/Manuals/Unix_4.0/Volume_1/00_Annotated_Table_of_Contents.pdf I'll "quote" it with another attachment. For those without image support, it appears these manuals were typeset with the Autologic APS-5, one of the first targets for device-independent troff (after the C/A/T). This also explains the addition of the word "original" before "Special Mathematical Font" in the explanatory paragraph for Table 1 in comment #4. Contrast with the same paragraph in comment #3. This is also consistent with the Murray Hill Bell Labs folks being so keen to reverse engineer the font data format as documented in the famous, and for a long time samizdat, paper "Experience with the Mergenthaler Linotron 202 Phototypesetter, or, How We Spent Our Summer Vacation" by Condon, Kernighan, and Thompson. Why pay a foundry exorbitant prices to code you a bespoke typeface when you can do it yourself? https://www.cs.princeton.edu/~bwk/202/summer.reconstructed.pdf (file #53282) _______________________________________________________ Additional Item Attachment: File name: unix_4.0_annotated_toc_typesetting.png Size:197 KB <https://file.savannah.gnu.org/file/unix_4.0_annotated_toc_typesetting.png?file_id=53282> _______________________________________________________ Reply to this item at: <https://savannah.gnu.org/bugs/?42473> _______________________________________________ Message sent via Savannah https://savannah.gnu.org/
