. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 516 BOOMERANGS. sails of a windmill, being rotated through 2^ or 3° in the direction of a rig-ht-handed screw about the lines B A, B C, as axes. This. ?g- 2- Fig. 1. deviation from the plane is subsequently referred to as the "twist," and the peculiarity that, as seen in the cross section of tig. 2, one face is more rounded than the other, is called the "; Boomerangs of the sec- ond type (tig. 3) are about To cm
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 516 BOOMERANGS. sails of a windmill, being rotated through 2^ or 3° in the direction of a rig-ht-handed screw about the lines B A, B C, as axes. This. ?g- 2- Fig. 1. deviation from the plane is subsequently referred to as the "twist," and the peculiarity that, as seen in the cross section of tig. 2, one face is more rounded than the other, is called the "; Boomerangs of the sec- ond type (tig. 3) are about To cm. long and 7 cm. wide, and have a cross section similar to that of fig. 2. The "twist" is in the op- posite direction, involving a left-handed rotation of The axes of rotation are now D E, F E instead of E D, E Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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