How acid rocked the world

It was known as acid, blotter acid, window pane, dots, tickets and mellow yellow. It was sold on the street in capsules and tablets but most often in liquid form, usually absorbed on to a piece of blotting paper divided into several squares: one drop, or "dot", per square. Lysergic acid diethylamide, or C20H25N30 to give it its snappy chemical formula, derived from lysergic acid, and it introduced you to a world of cosmic harmony and all-embracing love, or a black schizoid hell of paranoia and screaming demons.