Photo-Chemistry, Vol. 1 (Classic Reprint)

Unification of the scattered elements of this subject is no easy task, in view of the almost inevitable contingency of actinochemical changes with other thereby recognized and characterized alterations of material systems. There has resulted a delay, not without danger, in the attainment of independent status by photo-chemistry, having been for so long ancillary to her elder sisters, thermoand electro-chemistry, so that only by a masquerade, momentous both for theory and practice, as the science of radio-activity has this Cinderella of the sciences been accorded its due recognition. There exists, and is likely to continue, some difference of opinion as to the desirability of incorporating a discussion of photo-physical and radiation phenomena and laws in a work on photo-chemistry. But neglect of this aspect of the question and too narrow a circumscription of its domain can only lead to further delay in the discrimination of a definite body of laws for this science. For this reason the plan has been followed in the present work of discussing at some length certain intensive studies on cardinal points in photochemical change rather than that of enumerating and recording every example of photo-chemical reaction or light-sensitive substance. The aim has been to aid students with examples of working hypotheses helpful in the completer investigation of the economy of any given photo-chemical reaction.
(Typographical errors above are due to OCR software and don't occur in the book.)

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