| 434 / | HD | EDUCATION AND DEMONSTRATION |
| 276 | DF | SCIENCE {9} |
| 284 | DF | .~ Astronomy {1} |
| 285 | DF | .~.~ Representation of light generating celestial body {4} |
| 290 | DF | .~.~.~ Simulation of sun and earth {2} |
| 292 | | .~.~.~.~ And moon {1} |
| 293 | DF | .~.~.~.~.~> Moon model moved around earth model by mechanical or electrical means {1} |