The stipulations forwarded to the manufacturers were as fol lows: The investigation will include 1. Tests of welding torches. 2. Tests of cutting torches. 3. Tests of regulators. 4. Tests of oxyacetylene welded specimens. Throughout this series of tests the following conditions will be adhered to Gas: 1. A11 gas used will be of the same analysis within commercial limits. 2. Throughout the series of tests the gas consumed will be drawn from a bank of tanks so that its properties may be as uniform as possible. Identical equipment in the gas lines will be used m all tests.

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