xiv
PREFACE
mass" frequently used
by
Einstein for electric
charge.
All formulas
were
included
in
a
form
as
similar
to
those in the
original documents
as was
possible
with
our
word
processor.
We
kept
the standard
German
notation
used
at
the
time,
representing vectors
by
German
(Fractur)
letters
and
vector
products
by
[
];
for
example,
we
kept
[£#]
for the
vector
denoted in
current
literature
by E
*
H
or
E
*
H.
We are
indebted
to
John
Stachel, the Editor of
Volume 2,
and Robert
Schulmann,
Associate Editor,
as
well
as
Walter
Lippincott,
Director,
and
Alice
Calaprice,
Senior Editor,
of
Princeton
University
Press, for their
help
and
encouragement.
We
also
wish to
thank
Marjorie
Zabierek for her part
in
preparing
the final
typescript.
Anna Beck,
Translator
Peter
Havas,
Consultant