The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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PREFACE TO THE EIGHTH EDITION.
N EARLY a hundred pages of new subject-matter, and about the same number of fresh headings have been added to the present edition, together with many new diagrams; but this bringing up to date has not in-creased the bulk of the volume so far as to render it unwieldy, thanks to a process of concentration and elimi-nation applied to some of the less current articles. At the same time, it may be mentioned that this process of concentration has been more than balanced by the addi-tion of references to original sources and the extension of the list of works comprised in the Bibliography (p. 76).
Since the issue of the last edition of the Dictionary, the metric system has been placed on a satisfactory footing; this by more matured legislation than the unsatisfactory Weights and Measures Act of 1878. The cubic centi-metre is no longer statutory in Great Britain as a fluid measure or measure of capacity; the cubic centimetre being now replaced by the approximately equal millilitre, or one-thousandth of a litre. Other matters have been so re-ordered as to make the use of the metric system easy, certain, and exact. Still, the metric equivalents have not