refraction, astronomical
astronomical instruments - early works to 1800
sun -early works to 1800]]> Solar system - early works to 1800
Moon - charts, diagrams, etc.]]> scientific recreations - early works to 1800
practical jokes - early works to 1800]]> Music - early works to 1800
technology - early works to 1800]]> Deformities
Monsters
Zoology - Pre-Linnean works]]> rivers
Springs
Nile River]]>