THE LIBRARY POPULAR SCIENCE MONTHLY, December, 1929 (P. 24.) "Oil Wells Drilled in the Ocean." George Lee Dowd, Jr. Oil rom the bottom of the sea is now being pumped into reservoirs from hree under-water oil fields on the California coast. Huge wharves, a uarter of a mile long, reach out into the Pacific to connect with the derricks sed in plumbing the ocean bottom for petroleum. This article tells of ome of the problems which have been solved and of the manner in which he derrick foundations are constructed. (Illustrated.) (P. 30.) "Welding-The Silent Builder." Robert E. Martin. Noisy iveting hammers are gradually being replaced by torches and electric xcs in the construction of skyscrapers and bridges and in the fabrication ~f heavy industrial machinery. Numerous other manufacturing and contruction processes are now being accomplished by means of welding. lecently it has been made possible to study and improve welding operaions by means of photographs taken with infra-red light. (Illustrated.) (P. 49.) "Diamonds and Salt-Tiny Skyscrapers Built of Atoms."
