| MELVIL | US librarian (1851-1931) who devised an eponymous decimal system of library classification (6) |
| DEWEY | US librarian (1851-1931) who devised an eponymous decimal system of library classification (5) |
| OPTION | On pot I devised an alternative (6) |
| DINDY | Vincent ___ (1851-1931), French composer of Symphonie sur un chant montagnard francais |
| METRIC | Relating to the decimal system of measurement (6) |
| GALLUP | George, US statistician who devised a type of opinion poll (6) |
| HUBBLE | American astronomer who devised a classification system for galaxies in the 1920s (6) |
| JENNER | Edward ___, who devised the first successful vaccine and pioneered the science of immunology (6) |
| GEIGER | Hans ___, German physicist who devised a counter to measure radiation in 1908 (6) |
| ASIMOV | Author who devised the "Three Laws of Robotics" |
| ARGAND | Jean-Robert ___, French mathematician who devised a diagram that displays complex numbers |
| DRBACH | Bacteriologist, physician and pathologist who devised floral health remedies and spent some winters in Cromer in the 1930s (2, 4) |
| ANDERS | Celsius who devised the Celsius scale |
| BRENDEL | Alfred ?, classical pianist born in 1931 who was made an honorary KBE in 1989 (7) |
| DEWY | Sound US librarian's description of wet grass |
| TONIMORRISON | American author, born Chloe Ardelia Wofford in 1931, who died earlier this month (4,8) |
| ALGORISM | The Arabic or decimal system of counting (8) |
| ROBERTBUNSEN | German chemist who devised a kind of burner used as laboratory equipment (6,6) |
| SCOVILLE | Pharmacist who devised a scale based on the measurement of the pungency or spiciness of chillies (8) |
| ERNSTMACH | Austrian physicist who devised a system of speed measurement (5,4) |
