Popular Science L-7-4 (1948) is a Documentary film that follows at Arcata, California, testing technology for landing planes in fog. Also: a high-tech barber shop in Westwood Village, California; manufacture of precision steel gauge blocks in Eskilstuna, Sweden. Popular Science L-7-4 is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 8.0 out of 10 from 1 votes. Fans of documentary movies may also want to explore similar titles below.