(d) 10 grams of anthranilic nitrile, twenty grams of acetic anhydride, and twenty-five grams of sodium selenide were mixed in a sealed tube and heated together for three hours and a half at 110°-115°. The condensation product was crystalline when the tube was cooled to room temperature. The contents of the tube were extracted with dilute alkali as before, filtered, precipitated by carbon dioxide, and recrystallized from dilute alcohol. The yield was not over twenty per cent. (e) An attempt was made to make o-aminobenzoselenamide, and from the latter, by treatment with acetic anhydride, to form the quinazoline, but the yield of the amide was too small to carry the reaction further. The substance prepared by the above methods crystallizes from dilute alcohol in needles or prisms of dark brown color. It melts at 213.5° (corr.). It dissolves readily in hot alcohol but on concentration sometimes forms a sticky mass with a peculiar but not unpleasant odor. It dissolves readily in alkalis and is slightly soluble in hot benzene and chloroform, but insoluble in hot water. Crystals purified from (a) were analyzed and gave the following results: Calculated for Found C₉H₈N₂Se I II Carbon 48.38% 48.45% 48.62% Hydrogen 3.61 3.82 3.52 Nitrogen 12.55 12.51 12.66 Selenium 35.46 35.60 35.42 The crystals on standing in the presence of air and light decomposed with separation of finely divided selenium and methyl quinazolone. Analysis of Selenium Organic Compounds In the quantitative determination of selenium in quinazoline the method adapted by Becker and Meyer was found to be quite satisfactory(56). Other methods are listed in the bibliography(57). In the ultimate analysis of carbon and hydrogen, the ordinary absolute method was followed with the use of copper oxide, lead chromate, and lead peroxide in the tube. In the determination of nitrogen the ordinary absolute method was also followed excepting that a considerable quantity of specially prepared lead chromate powder was mixed with the sample in a number six porcelain boat. This was found to be desirable when the dinitroselenazole was burned. Selenium dioxide, which is a solid, seems to be formed in the tube and carried away by the current of carbon dioxide with some difficulty. In such a case the analysis usually took four hours after the combustion had actually started. In the carbon and hydrogen determination selenium dioxide was easily absorbed in the presence of oxygen gas. Preparation of 2-Phenylbenzoselenazole The first method employed was a modification of the method described by Fromm and Martin(58). Method (b) is an adaptation of the method for preparing benzothiazoles.