File:Aves egg in the first hours of incubation.jpg
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editDescriptionAves egg in the first hours of incubation.jpg | Fig. 21.—Two germ-discs of hen’s egg in the first hours of incubation (after Koller in Heisler): df, area opaca; hf, area pellucida; s, crescent (Koller's sickle); sk, crescent-knob; es, embryonic shield; pr, primitive groove. |
Date | |
Source | https://archive.org/details/cu31924001033459/page/40/mode/1up?view=theater A laboratory manual and text-book of embryology. Philadelphia, London, W. B. Saunders. |
Author | Prentiss, Charles William |
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current | 15:21, 16 March 2024 | ![]() | 965 × 480 (316 KB) | Rasbak (talk | contribs) | {{Information |description=Fig. 21.—Two germ-discs of hen’s egg in the first hours of incubation (after Koller in Heisler): df, area opaca; hf, area pellucida; s, crescent; sk, crescent-knob; es, embryonic shield; pr, primitive groove. |date=1915 |source=https://archive.org/details/cu31924001033459/page/40/mode/1up?view=theater A laboratory manual and text-book of embryology. Philadelphia, London, W. B. Saunders. |author= Prentiss, Charles William |other versions= }} =={{int:license-header}}... |
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