In Iowa, United States
How Geocaching Works
Related Web Page
Use of geocaching.com services is subject to the terms and conditions in our disclaimer
Cache is small. Tyvek log. Use a pen for writing [[and pushing]].
A Birefringent Puzzle
Find the coordinate for the cache.
Click on the picture.
Birefringence for Kids!
Gur pnpur pbagnvare vf cerggl uneq gb oernx, fb qba'g jbeel gbb zhpu.
- Paradichlorobenzine (as in urinal cake)Paradichlorobenzine between polarizing filters. Magnified highly with my microscope. Color saturation enhanced.
- Paradiclorobenzine formula
- Puzzle pieces with black background
Last Updated: on 4/6/2014 1:36:58 PM Pacific Daylight Time (8:36 PM GMT)
Coordinates are in the WGS84 datum