Wt. of dish 12.8825 12.8826 Wt. of dish and substance 13.0060 13.1310 Wt. of substance .1235 .2484 Wt. of dish and silver 12.9400 12.9980 Wt. of silver .0575 .1154 Neutralization equiv. 125 125.3 Using the same sample, a neutralization equivalent was obtained by titration with standard NaOH. Wt. of substance .0912 N/10 NaOH 7.25cc Neutralization equiv. 125.8 The above data shows that the sublimate is a mixture. No empirical formula can be calculated from the combustions, and different samples give different neutralization equivalents although the duplicate determinations on the same sample showed good agreement thus demonstrating the reliability of the methods. By fractional sublimation it was possible to obtain fractions with different melting points. The first sublimate melted sharply at 109 degrees. From the last fraction it was possible to separate some crystals that melt at 200 degrees Centigrade. These might possibly be p-acetyl-benzoic acid, as its properties of solubility, crystalline form, its melting point and power of sublimation agree with those of p-acetyl-benzoic acid. Those crystals that appeared identical with benzoic acid were placed in a melting point tube, and some known benzoic acid (from toluol) was placed in another tube. These two tubes were placed in the same sulphuric acid container and their melting points taken at the same time. They melted at the same temperature. The sublimate had a very pleasant aromatic odor resembling benzoin. It gave no coloration with ferric chloride, thus eliminating a large group of aromatic compounds. Some of the crystals were found to be identical with benzoic acid when examined under the microscope. The characteristic odor of methyl benzoate was produced when a small quantity of the crystals were heated with methyl alcohol and concentrated sulphuric acid. On treating some of the carefully neutralized product with ferric chloride solution, a flesh colored precipitate was formed. It agreed closely in its analysis with the precipitate formed with known benzoic acid. The filtrate left after the removal of the iron precipitate was acidified and extracted with ether, and the ether removed by evaporation. The resulting substance decolorized alkaline permanganate solution, but did not decolorize bromine water. When the leaflet needles that melt at 200 degrees were mechanically removed from the original sublimate, the substance left after precipitating with ferric chloride melted at 109 degrees. When these crystals were not removed, the melting point of this material was not definite, but was over a range of five degrees, from 110 to 115 degrees Centigrade.