From the March 14, 1931, issue

NEW WELDED PIPE LINE CARRIES WATER TO SAN DIEGO

On the front cover of this weeks SCIENCE NEWS LETTER, the cameraman has caught two electric arc welders tying in an important section of a 19-mile-long steel serpent, 40 inches in diameter in some places and 36 inches in others, that will carry water from reservoirs on the Cottonwood and Otay Rivers of California to San Diego.