List of Up down all around 

1. Earth's Magnetic Field

2.Dipping Compass
3.Cyanometer

4.Skywatching

5.Moon Box

6.Twinkling Starlight

7.Steller Refraction

8.Sheet Erosion

9.Split a Stone

10. The Parallax Principle

11.Parallax Shift

12.Height Calculation

13.Rare Earth Metal

14. Magnetic Filtration

15.Box Periscope 

16.Mapping the Ocean Floor