. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. Fig. 23. Sections of testis of the starling (Sturnus vulgaris), showing the effect of electric lighting added to the bird's normal daily duration of light during the autumn. (After Bissonnette, Physiol. Zool., 4.) (A) Inside young control bird—no light added —kept inside as control for (B) from November 9 to December 13. (B) Inside young experimental bird, receiving additional light from "25 watt" bulb from November 9 to December 13. Tot
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. Fig. 23. Sections of testis of the starling (Sturnus vulgaris), showing the effect of electric lighting added to the bird's normal daily duration of light during the autumn. (After Bissonnette, Physiol. Zool., 4.) (A) Inside young control bird—no light added —kept inside as control for (B) from November 9 to December 13. (B) Inside young experimental bird, receiving additional light from "25 watt" bulb from November 9 to December 13. Total treatment, 34 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nelsen, Olin E. (Olin Everett), b. 1898. New York, Blakiston
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
