Fatboy's answer was true, but don't let it confuse you, because you're asking about something different.

When smoking chemical extracts in the form of powder/crystals/resin, the method depends on what you are smoking and the temperatures required. I assume you are talking about salvia extract, in which case the easiest method is to load the bowl of your bong or handpipe with tobacco or weed (some headshops will give you salvia leaf with your extract to use for this purpose) and then add the dose of extract on top.

Most other extracts and freebases, such as DMT, require the use of a crackpipe, which is any pipe that allows an indirect flame to be applied to the substance. 

You don't need to scrape or boil your piece to smoke the accumulated resin. To get the resin in the bowl, simply apply a steady flame for the duration of a long hit. You can also smoke the resin lining the chamber of a handpipe (as long as it's not a waterpipe) by taking a crack lighter (one with an adjustable flame, like the kind they give you at circle k for buying two packs of cigs) and taking the hit through the carburetor and covering the bowl with your finger.

both of these methods will involve breathing butane fumes, but it comes with the territory if you're smoking hippie crack.

In America at least, salvia is purchased at stores which sell tobacco and related equipment. These are normally called Smoke Shops or Head Shops.

Taliban takes high cover
Can’t smoke ’em out? Troops struggle with 10-foot Afghan marijuana plants
IMAGE: Soldier and marijuana forest

OTTAWA - Canadian troops fighting Taliban militants in Afghanistan have stumbled across an unexpected and potent enemy — almost impenetrable forests of 10-foot-tall marijuana plants.

Gen. Rick Hillier, chief of the Canadian defense staff, said Thursday that Taliban fighters were using the forests as cover. In response, the crew of at least one armored car had camouflaged their vehicle with marijuana.

"The challenge is that marijuana plants absorb energy, heat very readily. It's very difficult to penetrate with thermal devices ... and as a result you really have to be careful that the Taliban don't dodge in and out of those marijuana forests," he said in a speech in Ottawa.
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"We tried burning them with white phosphorus — it didn't work. We tried burning them with diesel — it didn't work. The plants are so full of water right now ... that we simply couldn't burn them," he said.

Even successful incineration had its drawbacks.

"A couple of brown plants on the edges of some of those (forests) did catch on fire. But a section of soldiers that was downwind from that had some ill effects and decided that was probably not the right course of action," Hillier said dryly.

One soldier told him later: "Sir, three years ago before I joined the army, I never thought I'd say 'That damn marijuana.'"

Hey guys, so I'm sort of wanting to try something that will give me more visuel hallucinations rather then the whole auditory and stuff that weed gives you. I was wondering if someone could suggest a good beginner hallucinagen? And also, is it true that Shrooms contain penosillin?(Or howveer it's spelt??) and that if you're allergic you shouldn't take them?
Thanks loads!

some kind of unnatural resistance to marijuana

That said, shrooms are generally a nice first trip drug. Although I would recommend 2c-b for the first one because it's a very "nice" drug. It kind of cuddles with you. Other drugs can be far less friendly.

A few friends of mine tried Salvia, and nothing happened. Where I live they sell it convenience stores, it supposedly sucks.
 Well heres the entire story since you claimed you wanted to hear about an experience with it:
You have to be 18 to buy it but the guy at the store near where I live barely understands english, so my friends bought some and I sat out while they smoked it. According to them nothing happened, waste of money imo.

that's not rare at all man

Brownies Jeff. You may be resistant to it, but I'm sure an ample supply of brownies would be enough to overpower your resistance.

2c-b, whats that like? I think I've heard about it somewhere.... but I'm in Canada.... And I really don't think I'd be able to find it here =s. And I've thought of trying shrooms... but I always worry about having a bad trip and jumping off the roof or something lol.