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From Embryology

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Osborne O. Heard

Osborne O. Heard (1891–1983) produced model reconstructions for the Carnegie Institute. He spent 42 years at the department and made over 700 wax-based embryo reconstructions models. The models were mainly made by the lost-wax casting process. His models were also more detailed than the earlier Ziegler embryo models (1880's).

Links: Osborne Heard

Human Developmental Anatomy Center

HDAC 20 Osborne O. Heard Collection

  • This collection is primarily a record of anatomical modeler Osborne O. Heard's (1890-1983) work while at the Carnegie Institute of Washington's Department of Embryology.
  • It includes correspondence, early photographs of the department, and Mr. Heard.
  • Artwork includes sketches by James Didusch and mechanical drawings of various devices designed by Mr. Heard for the CIW and other departments at John Hopkins. Dates 1919-1989.
Links: Carnegie Stages | Carnegie Collection | Contributions to Embryology | ZieglerModels | Blechschmidt Models | Embryology Models


Heard OO. Methods used by C. H. Heuser in preparing and sectioning early embryos. (1957.) Carnegie Instn. Wash. Publ. 611, Contrib. Embryol., 36, 1-18.

Cite this page: Hill, M.A. (2024, June 20) Embryology Osborne Heard.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current09:21, 24 September 2011Thumbnail for version as of 09:21, 24 September 2011800 × 571 (93 KB)S8600021 (talk | contribs)==Osborne O. Heard== Osborne O. Heard (1891–1983) produced model reconstructions for the Carnegie Institute. Models were mainly by a lost-wax process and are said to be more detailed than the Zieglers’ models.