| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Sun Jul 2, 1989 | 1A | Certain secants | Ernst Theimer | Maleska |
| Sun Mar 8, 1970 | 78D | Conic lines in geometry | Eva Pollack Taub | Weng |
| Sun Apr 29, 1956 | 21A | Geometric curves. | Harold T. Bers | Farrar |
| Sun Apr 11, 1954 | 68D | Plane curves in math. | Bernice B. Amron | Farrar |