File:Mall Meyer1921 fig05.jpg

From Embryology

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Fig. 5. Method of piling wax mold

  1. baseboard
  2. perpendicular right angle corner
  3. glass plate
  4. wax mold
  5. vent
  6. galvanized iron wire bridge
  7. gate for plaster between parts of mold.


In order to make a reconstruction of any portion of an embryo it is necessary first to transfer the outlines of that structure from the photograph to the wax plates by means of carbon paper and a glass point used as a pencil. These outlines are then cut and removed from the wax and the plates squared off along the secondary guide-lines sufficiently far outside of the proposed model not to conflict with its casting.


In order that these finished plates, which we call mold plates, may be kept in exact apposition, they are piled in a rectangular corner made of plate glass (fig. 5). While this is being done it is necessary to cut certain artificial channels as vents, so that the air will escape from the openings when the plaster is poured in.


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Mall FP. and Meyer AW. Studies on abortuses: a survey of pathologic ova in the Carnegie Embryological Collection. (1921) Contrib. Embryol., Carnegie Inst. Wash. Publ. 275, 12: 1-364.

In this historic 1921 pathology paper, figures and plates of abnormal embryos are not suitable for young students.

1921 Carnegie Collection - Abnormal: Preface | 1 Collection origin | 2 Care and utilization | 3 Classification | 4 Pathologic analysis | 5 Size | 6 Sex incidence | 7 Localized anomalies | 8 Hydatiform uterine | 9 Hydatiform tubal | Chapter 10 Alleged superfetation | 11 Ovarian Pregnancy | 12 Lysis and resorption | 13 Postmortem intrauterine | 14 Hofbauer cells | 15 Villi | 16 Villous nodules | 17 Syphilitic changes | 18 Aspects | Bibliography | Figures | Contribution No.56 | Contributions Series | Embryology History

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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

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current08:59, 30 March 2017Thumbnail for version as of 08:59, 30 March 20171,000 × 693 (97 KB)Z8600021 (talk | contribs)
23:59, 19 November 2012Thumbnail for version as of 23:59, 19 November 20121,179 × 800 (122 KB)Z8600021 (talk | contribs)==Fig. 5. Method of piling wax mold== # baseboard # perpendicular right angle corner # glass plate # wax mold # vent # galvanized iron wire bridge # gate for plaster between parts of mold. In order to make a reconstruction of any portion of an embryo i