Sentence Examples

  • Photography is based on chemical action induced by luminous rays; apart from this practical application there are many other cases in which actinic rays occasion chemical actions; these are treated in the article Photochemistry.
  • He made important researches in photochemistry, made portrait photography possible by his improvements (1839) on Daguerre's process, and published a Text-book on Chemistry (1846), Text-book on Natural Philosophy (1847), Textbook on Physiology (1866), and Scientific Memoirs (1878) on radiant energy.