Acknowledgments
The translator
would
like to
thank
the staff
of the editorial
offices
of the Einstein
Papers
in Boston for
their
cooperation,
particularly
Dr. Michel
Janssen
for his
careful review of certain
letters
related
to
his
expertise
and for
helpful
comments
made
by
Christopher
J.
Smeenk, University
of Pittsburgh.
Giuseppe
Castagnetti,
Berlin,
provided
the
translation
of
the Italian letters
by
Levi-Civita.
Particular
thanks
also to
Alice
Calaprice,
Senior
Editor
at
Princeton
University Press,
for
her
ongoing
support
and assistance in the
preparation
and
production
of this
volume.