A Self-Igniting Bunsen. H. Schimmel. (Chern. Zeit., 1903, xxvii., 1037.)-This is a Bunsen fitted at its base with a two-way cock, from which a by-pass tube rises to a short distance below the orifice of the burner, where it carries a small ball of platinum black. When the crank handle of the cock is at one end of its limited travel, the gas is entirely shut off; when the handle is moved to its intermediate position, gas is admitted to the by-pass, and is inflamed by the platinum ; and when the

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... rank is thrown right over, the by-pass is cut out and the main supply turned on,