| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| xose | " Fantastic!! https://publiclab.org/notes/warren/12-02-2018/crystalline-silica-from-tile-grout-at-as220-microscope-workshop " | Read more » | over 5 years ago | |||
| warren | "Exciting! We had some really interesting photos of silica sand, and took some cool pictures: https://publiclab.org/n/17785 at AS220 in Providence t..." | Read more » | over 5 years ago |