National Geographic : 1942 Aug
WHY THESE SHELLS WILL EXPLODE AT 13,335 FEET! Because that's where the gunner wants them to explode. After the high-flying bomber is picked up by fire-control instruments, the uncannily accurate time fuse on each shell is set to explode at target height! America's anti aircraft fire is swift, accurate, cer tain-because of time-precision -part of Hamilton's contribu tion to the efficiency of America's men at war. JANE BLAKE'S PULSE, weak and rapid, flashes a danger signal to the doctor as he times the pulse beats by his Hamilton. About 20 beats in 15 seconds is the average woman's pulse-rate - 18 for a man.Your doctor may know many reasons why your pulse should vary. But he's sure to know it's vital that his watch makes no mistake. That's why doctors, like nurses, engineers, railroad men, so frequently carry Hamiltons. TIME IN WAR IS PRECIOUS! It's up to every last one of us to make the most of it-and that is done best with the unfailing aid of an accurate watch-a Hamilton. Uncle Sam is utilizing the "know how" of the makers of Hamiltons to supply a wide range of preci sion instruments essential for Victory. The home front can de pend on that same skill for timing the myriad tasks support ing the war effort. Hamilton Watch Company, 284 Columbia Avenue, Lancaster, Pennsylvania. *Hamilton's experience building precision instrumentsfor the government and watchesfor railroadmen insuresthe greatestpossible accuracyin every Hamilton. "Buy U. S. War Bonds-They Identify You"