Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 358
rtenthey manifest them-selves as heat; as theygrow still shorter theybecome visible as light,then as a source of chem-ical activity, and finallythey again pass beyondthe range of our sensa-tions. We perceive onlya small part of the possi-ble waves. Color.—We should ex-pect these varying lengths of… … Fig. 234.—A train of prisms.
Physics
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