July, 1925GGRMANIUM ARYL AND ALKYL COMPOUNDS 2039 6 or more moles of sodium hydroxylamine disulfonate which rapidly hydrolyzed to an acid solution of monosulfonate.Preparation of Dimethylg1yoxime.-The biacetyl monoxime and monosulfonate were filtered to remove any sediment, mixed in a 15-liter flask, the mixture was heated to 70" and allowed to remain warm and occasionally stirred for several hours. The dimethylglyoxime separated in crystals that were filtered from the solution after it had become cold. They were washed with cold water until free from sulfate; yield, 575 g. ; 235-240'.Recrystallization was unnecessary since the product was pure white and free from tarry matter. SummaryA study has been made of the conditions affecting the formation of dimethylglyoxime, and simplified and efficient methods have been devised for the preparation of biacetyl monoxime, sodium hydroxylamine monosulfonate and dimethylglyoxime.

THE following paper contains: I. A brief historical review of the work published up to the present time upon hydronitric acid and the inorganic trinitrides; 11. An experimental study of (A) the method of W. Wislicenus for preparing hydronitric acid, (B) the composition of certain inorganic trinitrides, (C) a method for the detection of hydronitric acid and inorganic trinitrides, and (D) the reaction between hydronitric acid and potassium permanganate in the presence of sulphuric acid.

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