130 Miracles Ahead! 



to illuminate any moving object while a camera takes a series 

 of still-life pictures in all positions. 



Just as the stroboscope makes it possible to check, study, 

 and test a machine without stopping it, so other electronic 

 devices make it possible to check other production without 

 stopping the flow of material. The colorimeter makes it pos- 

 sible to check samples of a liquid without taking a sample 

 and putting it through chemical analysis. As the liquid, in 

 process of production or use, flows through a glass tube, the 

 colorimeter analyzes it by color. 



Welding has long made use of the advantages of electronic 

 controls, for electronic timers truly can give the advantage of 

 split-second timing. This accurate control has meant better 

 welds, and safer welds, with unfailing accuracy. And X-ray 

 examination of welding has furnished a further quick check 

 to determine perfection. Resistance welding is speeding up 

 the process of welding by making it possible not only to time 

 the heat of a weld to the split second but to control the 

 amount of heat applied to the weld, and to control it to a 

 fraction of a degree. 



New Medical Servants 



Electronics has long been the handmaiden of medicine. The 

 electrocardiograph has made it possible to record the picture 

 of the beating of a heart, giving the doctor a far more accu- 

 rate diagnosis of certain heart conditions than is possible by 

 any other means. It has enabled him to apply healing measures 

 to correct a trouble before a sudden failure was the first warn- 

 ing that anything was wrong. The electric knife has made 

 bloodless surgery possible. The use of X ray in diagnosis, in 

 setting bones, and in treating certain diseases is widespread. 

 A recent development, called the "laminograph" can X-ray 

 a given layer of tissue, without recording a picture of other 



