Summary
Methods are presented for practicing the viewing of stereoscopic pictures of crystal structures and molecular models without optical aids.
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References
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Y. Nakamura, R. Hollenstein, J. Zsindely, H. Schmid and W. E. Oberhänsli, Helv. chim. Acta58, 1949 (1975).
This impression of 3 pictures can be vexing at first. A piece of cardboard may be inserted between the 2 printed frames and extended towards the observer's nose. Then the 2 frames will fuse into only 1 picture, the stereoscopic one. As soon as some practice is gained, the cardboard can be omitted. Cf. M. M. Crozat and S. F. Watkins, J. chem. Educ.50, 374 (1973).
Practicing should not be overdone; eye strain may result.
U. Schmid, H. Heimgartner, H. Schmid, P. Schönholzer, H. Link and K. Bernauer, Helv. chim. Acta58, 2222 (1975).
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The effect produced by different magnification ratios can be seen in K. Jonas, D. J. Brauer, C. Krüger, P. J. Roberts and Y.-H. Tsay, J. Am. chem. Soc.98, 74 (1976), see p. 79.
The trained observer may want to look at such an example; e.g. H. B. Bürgi, H. Gehrer, P. Strickler and F. K. Winkler, Helv. chim. Acta59, 2558 (1976), see p. 2560.
T. J. Petcher, H.-P. Weber and A. Rüegger, Helv. chim. Acta59, 1480 (1976), see p. 1488a.
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Séquin, U. How to view stereoscopic pictures of crystal structures and molecular models. Experientia 33, 1115–1118 (1977). https://doi.org/10.1007/BF01946004
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DOI: https://doi.org/10.1007/BF01946004