An introduction to projective geometry and its applications; an analytic and synthetic treatment (1905)
Emch, Arnold, b. 1871 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 241
Fig. 98. Fig. 99. dv But as soon as these corresponding rays have crossed thedouble-ray dlf the section AB is acted upon by tension. Fromthis it follows that the material included by one angle formed bythe double-rays is subject to tension only, while the supplementarypart is subject to compression…
Geometry, Projective · Geometry, Analytic
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