defects, porosity, and weld metal embrittlement if they come in contact with the electrode, the arc, or the welding metal. The gas also transfers heat from the tungsten electrode to the metal, and it helps start and maintain a stable arc.

The selection of a shielding gas depends on several factors, including the type of material being welded, joint design, and desired final weld appearance.  Argon is the most commonly used shielding gas for GTAW, since it helps prevent defects due to a varying arc length. When used with alternating current, argon shielding results in high weld quality and good appearance. Another common shielding gas, helium, is most often used to increase the weld penetration in a joint, to increase the welding speed, and to weld metals withThat's the central theme for the play "Is He Dead?" at the Arvada Center, according to the program. And the play's premise certainly looks as if it might address the question.

"Is He Dead?" is a farcical melodrama, where the good and bad characters have no depth and the twists and turns of the plot are easily anticipated. The play is set in mid-19th century France, performed in period costume on period scenery, which sets a certain aesthetic expectation for the production.

The value of one's artwork is an interesting and valuable idea on which to base a play and certainly worth exploring, but the promised examination of ideas never materialized. Instead, the play, which was considered bad when Mark Twain wrote it, was not really improved upon by David