Signedon photograph: Vantage Art, Inc. W.H. Freeman and Company, 41 Madison Ave. New York, NY 10010
Inscribedat the top: onion root tip cell [and] These holes (pores) in the nuclear envelope are 1,000 A in diameter
at the bottom: 46.5% black halftone
FunctionTo present the result obtained from the freeze-etching instrument, before the Elgbrant.
Primary SourcesWilliam A. Jensen and Roderic B. Park, Cell Ultrastructure (Belmont, CA: Wadsworth Publishing Company, Inc., 1967).
ProvenanceFrom Biolabs Room A-206, Department of Molecular and Cellular Biology, Harvard University. Givent to CHSI by Prof. Daniel Branton.