- This loop takes you on a tour through forest, around ponds and by wetlands. There is lots of wildlife here and if you are lucky, you might spot some of the residents of those ecosystems. You will get a good forest bath and hiking the hills and ravines will give you a decent workout too!
- Homemade liquid nitrogen generator using Joule Thomson Throttling (homemadeliquidnitrogen.com)
I determined that there was no good tutorial on how the average person can liquefy nitrogen or air. A few references to cryocoolers, which use an internal helium Stirling engine to create a cold head exist, and I even saw one person use this as a means to liquefy nitrogen, allowing the gas to condenses as it passes over the head. This method is cheating because it relies on a self-contained refrigeration unit. I wanted to do this using regenerative cooling just like Carl Linde back in 1895.
washington trails association of