Die Entstehung der Stirn- und Gesichtslagen.

Ahlfeld, Fredrich, 1843-1929.

Leipzig : Friedr. Wilh. Grunow, 1873.

Description : [i]-iv, [1]-128 p., [5 l] pl. ; ill.: 5 phots., 15 woodcuts. ; 22.7 cm.

Photographs : 5 leafs of photolithographs.

Subject : Fetal face & neck — Anomalies.

Notes :

Ahlfeld's research based on 30 cases of fetal craniofacial anomalies. In 1880, Ahlfeld found it necessary to answer his critics with an analytic titled, "Zur Frage über die Entstehung der Gesichtslagenhaltung" (Archiv für Gynäkologie, vol. 16, p. 45-57). Without the benefit of ultrasound, nineteenth century obstetricians had difficulty distinguishing among deformities caused by facial positioning in the developing fetus, mechanical defects caused by delivery, and what were perhaps cases of Robinow syndrome.

Albert shared his method for making collotype plates with the Berlin lithographer, Max Gemoser, who then devised his own version of the process and coined the term, "Lichtdruck." In 1870 he was hired by the printing firm of Ohm and Grossman who tried, but failed, to keep Gemoser's method secret.

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