| DEWAR | British chemist and physicist who developed a vacuum flask, d1923 (5) |
| RICHTER | Charles Francis -; seismologist and physicist who developed a scale for expressing the magnitude of an earthquake (7) |
| DAVY | British chemist and inventor, born Cornwall 1778, who discovered sodium, potassium and calcium (4) |
| CROOKES | Sir William -; chemist and physicist who discovered thallium and invented the spinthariscope (7) |
| CAVENDISH | Chemist and physicist who discovered hydrogen; or, the "Manx Missile" who became the first Briton to win the Tour de France green jersey in 2011 (9) |
| WATSONWATT | Depicted in Castles in the Sky, physicist who developed a radar that was pivotal in the allied victory of the Battle of Britain (6-4) |
| ASTON | Glass-blower, pianist and physicist who mastered surfing in Honolulu and developed the mass spectrograph to accurately measure neon isotopes (5) |
| VOLTA | Alessandro ___, Italian physicist who developed the first electrochemical cell (5) |
| TITRE | Concentration, to a British chemist |
| MAUVE | Colour of the first aniline dye, patented by British chemist William Henry Perkin in 1856 (5) |
| ARDEN | Said to have handed out red lipsticks to marching suffragettes, a businesswoman who developed a line of cosmetics including Eight Hour Cream and Red Door scent (5) |
| LIBBY | United States chemist who developed a method of radiocarbon dating (1908-1980). |
| ELLIS | Philologist who developed a phonotypic alphabet with Sir Isaac Pitman (5) |
| GLOCK | Gaston, late Austrian engineer who developed a pistol named after him (5) |
| LABAN | Hungarian choreographer who developed a system of dance notation (5) |
| MAORI | Migrant settlers in New Zealand who developed a rich culture before the arrival of Europeans (5) |
| BAOCK | Stephen who developed a test for determining milk's fat content |
| APGAR | Physician Virginia who developed a self-named neonatal score |
| ICENI | Old people who developed a certain amount of proficiency |
| BOOLE | English mathematician who developed a form of algebra for use in logic |
