| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| eustatic | " " | Read more » | about 10 years ago | |||
| eustatic | "https://farm6.staticflickr.com/5233/14324445688_189d7e59a6_h.jpg I guess it is fluorescing! " | Read more » | about 10 years ago | |||
| warren | "Also why does the laser show more in the coal dust vial? Are you sure it isn't fluorescing? Could you take a clearer photo? " | Read more » | about 10 years ago | |||
| warren | "Wow, great work. For Grand Isle Coffee 10x (the one where the laser doesn't go all the way through), it looks like you could dilute it further. Or ..." | Read more » | about 10 years ago | |||
| warren | "This looks great! Now, the tough part -- detecting enough light to get a spectrum. If you let the sample settle for a few days, does it look more c..." | Read more » | almost 11 years ago | |||
| warren | "Also, i ended up ordering those crude oil samples online: http://publiclab.org/notes/warren/05-03-2013/crude-oil-samples-for-purchase-online I'm h..." | Read more » | almost 11 years ago | |||
| warren | "Hi Scott -- what kind of light are you using? When i've done this, i've let it settle in a clear container so I can see that all the muck has real..." | Read more » | almost 11 years ago |