The present volume, "Fluorine" Suppt. Vol. 4, covers the oxygen compounds of fluorine and the binary fluorine-nitrogen compounds. In the first part "Fluorine and Oxygen," oxygen fluorides OnF m are described in the order of decreasing F: 0 ratio. It finishes with a description of hyperfluorous acid HOF. The second part "Fluorine and Nitrogen" deals with the binary fluorine-nitrogen com pounds. They are subdivided on the basis of the number of nitrogen atoms per molecule. Thus, species such as NFt, NF, NF, and NF are considered first followed by the dinitrogen and 3 2 trinitrogen fluorides NF,...