(RICHARD) FEYNMAN, LECTURES ON PHYSICS — The most significant event of the nineteenth century will be judged as Maxwell's discovery of the laws of electrodynamics. The American Civil War will pale into provincial insignificance in comparison with this... event.
| A. | Writer in the margin of Diophantus' "Arithmetica" | FERMAT |
| B. | Surround, ring | ENCIRCLE |
| C. | Serious warning in sports (2 wds.) | YELLOWCARD |
| D. | About to be served (3 wds.) | NEXTINLINE |
| E. | Don's body | MAFIA |
| F. | Classic sailor's tattoo | ANCHOR |
| G. | Historical trio member having a tilde | NINA |
| H. | Farsighted perspective (2 wds.) | LONGVIEW |
| I. | Not fixed, as a set of beliefs | EVOLVING |
| J. | Business that overcharges customers (2 wds.) | CLIPJOINT |
| K. | Painter of "Assumption of the Virgin," 1516-18 | TITIAN |
| L. | Cited but not verified | UNOFFICIAL |
| M. | Glossy black | RAVEN |
| N. | Way of getting connected since the 1970s | ETHERNET |
| O. | 1964 Life magazine coinage regarding "The Bing Crosby Show" | SITCOM |
| P. | Be unwilling to let go | OBSESS |
| Q. | Participants in a TV game show originally hosted by Bob Eubanks | NEWLYWEDS |
| R. | Stones in a Georgia orchard (2 wds.) | PEACHPITS |
| S. | Strong coffee, not the wimpy stuff (2 wds.) | HIGHTEST |
| T. | "Truer words were never spoken!" (3 wds.) | YOUSAIDIT |
| U. | Chance to make a competitive splash (2 wds.) | SWIMMEET |
| V. | Administer in an unwelcome way | INFLICT |
| W. | In the bag | CLINCHED |
| X. | Radio descriptor (hyph.) | SHORTWAVE |