You can search -- the link is in the registration email, and in my signature.
The internal vBulletin search is only accessible to moderators and some subscribers, because vBulletin keeps having problems, BUT it does NOT work nearly as well as the Google custom search for finding answers to questions like yours. (It's better at moderator things like "List all the posts in the last month".)
However, you may or may not get find what you're looking for -- chemistry problems are the same the world over, but equipment is local and highly varied.
Anyhow, good luck!
Ben
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