National Geographic : 1947 Mar
© National Geographic Society "Having a Lovely Drive, Dear. We'll Be Home by Seven" New mobile radiotelephone sets installed in passenger cars or trucks make it possible to talk between a moving vehicle and the home or office. Telephone in a vehicle has its own number. Ektachromes byWillard R.Culver She Needs a Microscope toAdjust Tiny Vacuum Tube Parts Magnification shows whether fine wires and other delicate parts areproperly placed and tightly welded together. Inassembling experimental tubes, gloves are worn because perspiration can corrode metal.