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Geometric Models for Spherical Trigonometry by A. Harry Wheeler and his Students Kello Kern Bland and D. Parker

Click to open image viewer. Geometric Models for Spherical Trigonometry by A. Harry Wheeler and his Students Kello Kern Bland and D. Parker CC0 Usage Conditions ApplyClick for more information. IIIF ...
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Patterns and Drawings Relating to Models for Spherical Trigonometry and Perpendicular Planes

1. two sheets with drawings for patterns and drawings of the assembled model. One sheet is marked: SUPPLEMENTARY TRIHEDRAL ANGLES (/) STRIA (1)*. The second sheet is marked: SUPPLEMENTARY TRIHEDRAL ...