Abstract
Although much work has been done in the slow oxidation of ethylene since one of us with R. V. Wheeler discovered that it involves the intermediate formation of acet- and form-aldehydes and formic acid, without any liberation of either carbon or hydrogen, some difference of opinion has recently arisen as to the nature of the initial product. Bone and Wheeler -who worked with ethylene-oxygen mixtures both in sealed bulbs at 300° to 350° and about 2 atmosphere pressure, and in their circulation apparatus in contact with porous porcelain at 400° and pressures below 500 mm. -concluded that the main course of the combustion could be represented by the following hydroxylation scheme.

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