| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Great, also linking back to this prior post! https://publiclab.org/notes/mathew/04-22-2014/frac-sand-mining " | Read more » | almost 6 years ago | |||
| mathew | "In my silica wiki page, I mentioned polarized light microscopy as a detection method, and yes, I'm looking into it. What you see here is polarized..." | Read more » | almost 10 years ago |