pure heroin, which is a white powder with a bad taste, is rarely sold in the streets in any place. More illicit heroin is a white powder to dark brown. The differences in color must be at different licensees court and Court of drugs toward bottom and the majority, if all the time that the heroin sold on the streets, when it reaches the streets is perhaps 10 to 15 per cent heroin. Another form of heroin, "black tar" heroin, is in majority