| 434 / | HD | EDUCATION AND DEMONSTRATION |
|
| 276 |  | SCIENCE {9} |
| 277 | DF | .~> Crystal structure model or display having discrete element (e.g., geometric shape, light, etc.) representing atom |
| 278 | DF | .~> Molecular model or display having discrete element representing atom or radical {2} |
| 281 | DF | .~> Model or display demonstrating structure or property of atom or radical {1} |
| 283 | DF | .~> Means demonstrating physical property (e.g., osmotic pressure, solubility, etc.) of substance |
| 284 | DF | .~> Astronomy {1} |
| 295 | DF | .~> Biology or taxidermy {1} |
| 298 | DF | .~> Chemistry or metallurgy |
| 299 | DF | .~> Geology |
| 300 | DF | .~> Physics {3} |