l x x x i i E D I T O R I A L M E T H O D References to significant events in Einstein’s life and work and general chrono- logical information not available in specific documents are contained in the Chronology. An Alphabetical List of Texts, Calendar of Abstracts, Chronology, Appendixes, Literature Cited, Index, and Index of Citations are presented at the end of each volume. Writings Published writings are presented in the order of their completion, submission, re- ception, or publication, whichever is available in this order. These writings are in- troduced by a title page that contains (a) the document number (b) an English title (c) the document’s short title ascribed by the editors according to the date of pub- lication and used in the Literature Cited (d) the date of completion, if known oth- erwise the date of submission, reception, or publication (e) the source of the published version (f) republished versions of the text with revisions or annotations that can be ascribed to Einstein. Each text is presented in facsimile and includes the original pagination, note placement, and running heads. Parts of texts not relevant to this edition but appear- ing on the same page as Einstein’s text are reproduced in a lighter type. If an original text of a later supplement to a paper was printed immediately fol- lowing the paper, then this presentation is retained. Both dates are noted in the List of Texts, on the relevant title page, and in a textual note. Editorial endnotes are indicated by consecutive numbers in square brackets placed in the margins of texts, directly adjacent to the line containing the passage or equation upon which the note comments. Annotation begins after the last page of each full text document. Unpublished manuscripts are given a title that is either a translation of the orig- inal title or a title given by the editors. Its presentation begins on a new page and otherwise follows the rules for the presentation of letters explained below. Letters Letters are titled by the name of the author or recipient other than Einstein Ein- stein’s name as author or recipient is omitted. For any single date, outgoing letters by Einstein are presented first, followed by incoming letters. They are presented in alphabetical order by receiver or sender. For Einstein’s outgoing correspondence, the recipient’s address is placed in the descriptive note. For incoming correspondence, all handwritten, printed, or typed letterheads are placed in the descriptive note. If address information is repeated at the foot of a document, it is omitted from the transcribed text. Printed information