Page:Popular Science Monthly Volume 64.djvu/154

150 The wonderful lightness of this model will be better understood when we realize that it carries twenty-five square feet of supporting or horizontal wing surface to one pound of weight, while a wild duck

has only one half of one square foot of wing surface to one pound of weight. The model almost rivals a mosquito in lightness—one pound of mosquitoes represents an area of wing surface of forty-nine square feet.

Dr. Bell is now making a wind boat on this model, and it would not be surprising if this new wind boat should eclipse even the redoubtable Mabel II.