National Geographic : 1933 Feb
BOEING'S LARGEST TRIMOTORED TRANSIT SHIP CARRIES PASSENGERS AROUND MOUNT RAINIER When clouds obscure the valleys and lower peaks, the majestic dome is an island of snow and ice above asea offleece. Inages past the summit was much higher. Geologists have discovered that eruption blew off 4,000 feet of the peak and scattered the soil over the Puget Sound country. The air plane, supreme triumph of the machine age and conqueror of the heights, is 90o per cent a product of handlabor.