popper-logic-scientific-discovery

TRANSLATORS’ NOTE
The Logic of Scientific Discovery is a translation of Logik der Forschung, published
in Vienna in the autumn of 1934 (with the imprint ‘1935’). The
translation was prepared by the author, with the assistance of Dr. Julius
Freed and Lan Freed.
The original text of 1934 has been left unchanged for the purpose of
the translation. As usual, the translation is a little longer than the original.
Words and phrases for which no equivalent exists had to be
paraphrased. Sentences had to be broken up and rearranged—the more
so as the text to be translated was highly condensed: it had been drastically
cut several times to comply with the publisher’s requirements.
Yet the author decided against augmenting the text, and also against
restoring cut passages [except for a few words indicated by square
brackets or footnotes].
In order to bring the book up to date, the author has added new
appendices and new footnotes. Some of these merely expand the text,
or correct it; but others explain where the author has changed his
mind, or how he would now reframe his arguments.
All new additions—new appendices and new footnotes—are
marked by starred number; and where old footnotes have been
expanded, the expansion is also marked by a star (unless it consists
only of a reference to the English edition of a book originally quoted
from a German edition).