| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "If bubbling room air through an aquarium removes some dust from the air (including some silica dust) then growing diatoms in the water is not requi..." | Read more » | over 8 years ago | |||
| marlokeno | "Thanks for sharing your expertise, @martenskram. I didn't know that bubblers were inefficient under 1-2 µm. Your information about flow & part..." | Read more » | over 8 years ago | |||
| martenskram | "I hate to be pessimistic, but even a medium efficiency supply air filter is probably more effective in removing the dangerous particles (respirable..." | Read more » | over 8 years ago | |||
| marlokeno | "@eustatic -the graphic comes from a 1996 OSHA campaign, under then-sect'y of Labor, Robert Reich, who resigned in '97, he wrote, to spend more time..." | Read more » | over 8 years ago | |||
| eustatic | "dope graphic " | Read more » | over 8 years ago | |||
| mathew | "@DavidMack Good catch! My notebook measures test 2 at 38.78, right next to 39.78 for the next test! I edited the note. thanks! You're right abou..." | Read more » | almost 9 years ago | |||
| DavidMack | "@mathew Great work and the title is appropriate! Sometimes when I’d compare instruments head to head it would be referred to a “shoot out”—an inst..." | Read more » | almost 9 years ago | |||
| warren | "Yeah Dan, I later realized that a draw valve at the top would be better than a push valve at the bottom, and I think it'd mean the gasket would be ..." | Read more » | almost 9 years ago | |||
| danbeavers | "@warren How do you start the timer? I don't see a sensor for the start, only the end. Another set of electrodes appear necessary. Will that set ..." | Read more » | almost 9 years ago | |||
| warren | "Wow, very cool. I'm thinking of what kinds of vessels could be easily adapted to a DIY version of the sort of spring-loaded bubble making frame in ..." | Read more » | almost 9 years ago |