coll Jid? Likely a dealer's code or an earlier collection reference.

Caspar 58 A bibliographic reference to Max Caspar’s Bibliographia Kepleriana, where this specific edition of Kepler's work is listed as entry number 58.

HERALD OF SCIENCE NO. 6

A designation given by Bern Dibner to the 200 most significant books in the history of science and technology.

BURNDY LIBRARY

Chartered in 1941

GIFT OF

BERN DIBNER Bern Dibner (1897–1988) was an industrialist and historian who founded the Burndy Library to house his massive collection of scientific milestones.

# The Dibner Library ## of the History of ## Science and Technology

SMITHSONIAN INSTITUTION LIBRARIES

In 1974, the Dibner family donated a major portion of the Burndy Library to the Smithsonian Institution, forming the basis of this specialized research library.

Postage stamp from the German Democratic Republic (DDR) original: "DDR" German Democratic Republic 50 *1571 Johannes Kepler A commemorative stamp likely added by a previous owner or the library, celebrating the astronomer Johannes Kepler, born in 1571.