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38
Light Waves and Their Uses
refraction we may obtain a very considerable number of variations of form, as illustrated in Figs. 34, 35.
One of these types, enlarged in Fig. 36, has been arranged
FIG. 35
refraction we may obtain a very considerable number of variations of form, as illustrated in Figs. 34, 35.
One of these types, enlarged in Fig. 36, has been arrangedFIG. 35
