Plan your visit. 225 Madison Avenue at 36th Street, New York, NY 10016.

Plan your visit. 225 Madison Avenue at 36th Street, New York, NY 10016.

Autograph postcard signed : [Berlin], to Erwin Finlay Freundlich, [1915 Mar. 19].

BIB_ID
336904
Accession number
MA 4725.9
Creator
Einstein, Albert, 1879-1955.
Display Date
[1915 Mar. 19].
Credit line
Gift of Mr. Horace Wood Brock, Mr. John Biddle Brock, and Ms. Hope Brock Winthrop, in loving memory of their parents, Horace Brock (1918-1981) and Hope Distler Brock (1908-1988), 1991.
Description
1 item (1 p.) ; 14.0 cm
Notes
Part of a collection letters from Albert Einstein to the German astronomer Erwin Finlay Freundlich. Letters in this collection have been described individually in separate catalog records; see collection-level record for more information.
Place and date of writing from postmark.
Provenance
Mr. Horace Wood Brock, Mr. John Biddle Brock, and Ms. Hope Brock Winthrop.
Summary
Providing equations to further the discussion on "the question of whether matter can produce a gravitational field other than a g44 field. This is not the case;" concluding "Thus it is proven that for the planetary problem a g11 field cannot come into consideration."