1. Darwin on Variation and Heredity

   • Rasmus G. Winther

   OriginalPaper Pages: 425 - 455

2. Last Judgment: The Visionary Biology of J. B. S. Haldane

   • Mark B. Adams

   OriginalPaper Pages: 457 - 491

3. The Specimen Dealer: Entrepreneurial Natural History in America's Gilded Age

   • Mark V. Barrow Jr.

   OriginalPaper Pages: 493 - 534

4. Ephestia: The Experimental Design of Alfred Kühn's Physiological Developmental Genetics

   • Hans-Jörg Rheinberger

   OriginalPaper Pages: 535 - 576

5. Essay Review: Sociobiology: Twenty-Five Years Later

   • Michael Yudell
   • Rob DeSalle

   ReviewPaper Pages: 577 - 584

6. Book Reviews

   BookReview Pages: 585 - 614

7. Index

   BookReview Pages: 615 - 624