I-beam. A steel bar with the cross-section of an I. Sometimes called EYE BEAM.

Line. Hose or pipe carrying gas.

Manifold. A header with outlets or branches by which several cylinders of gas may be used in batteries.

Monel Metal. An alloy of copper and nickel.

Nipple. A short piece of pipe.

Overhead Welding. Welding with the torch overhead.

Oxidation. A combination with oxygen.

Oxide. A coating or scale formed by oxygen combining with metal.

Oxidizing Flame. A flame with an excess of oxygen gas.

Oxygen. A non-inflammable gas used in oxy-acetylene welding and cutting.