National Geographic : 1930 Jan
THE NATIONAL GEOGRAPHIC MAGAZINE WHERE THE SUN DOES THE WORK Solar heaters installed on the roof of an apartment. Fireless heaters are popular through out the State, which boasts of so many hours of sunshine each day. Water, circulated in,the pipes through the heating boxes, is stored in an insulated tank ready for use at a temperature just short of the boiling point. PJhotographs by Clitton Adams TINTING THE ELUSIVE PILL Spraying golf balls with paint in a Tampa factory. Some of the balls are painted bright orange to increase visibility in grass and sand traps.