| Clue | Source | Date |
|---|---|---|
| Lab tubes | LA Times Daily | 05 Mar 2021 |
| Lab tubes | The Washington Post | 05 Mar 2021 |
| Means of drawing up solutions | New York Times | 13 Oct 2018 |
| Lab tubes | Wall Street Journal | 20 Jan 2018 |
| Means of drawing up solutions | ||
| Chemistry lab droppers | New York Times | 01 Mar 2015 |
| Chemistry lab droppers | ||
| Lab tubes | ||
| Lab tubes | ||
| Lab measurers |