MARIJUANA CANNABIS MARIHUANA MEDICAL LEGALIZE WEED 420 OBAMA RON PAUL BONG RIP JOINT KUSH DRUGS SEEDS WAR NEWS VAPORIZER BOWL HASHISH BLUNTS HASH GANJA HEMP … Analysis of the vapor from the Volcano Vaporizer found that using multiple passes it delivered 36% – 61% of the THC in the sample – a more recent study using pure cannabinoid preparations achieved a maximum of 54%