. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 30 P. S. HEX SHAW AND D. S. FRANCIS 20 cm. distance was approximately 720 roentgens per minute, knowledge of the exact amount not being essential. The radiation was supplied by a standard, Coolidge Type, air-cooled, tungsten target, X-ray tube. The conditions under which the radiation was obtained were 120 kv., 180 pv., 5 ma. and a filter of thin paper. After exposure the eggs were arranged in Syracuse dishes in a larger volume of water and sperm suspension in proper dilution was. 36 72 144 Roentgens x 100 288 FIG. 1. Curves
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 30 P. S. HEX SHAW AND D. S. FRANCIS 20 cm. distance was approximately 720 roentgens per minute, knowledge of the exact amount not being essential. The radiation was supplied by a standard, Coolidge Type, air-cooled, tungsten target, X-ray tube. The conditions under which the radiation was obtained were 120 kv., 180 pv., 5 ma. and a filter of thin paper. After exposure the eggs were arranged in Syracuse dishes in a larger volume of water and sperm suspension in proper dilution was. 36 72 144 Roentgens x 100 288 FIG. 1. Curves showing how irradiation effect (cleavage delay) varied with respect to dose of radiation administered. Curves A and B show the results obtained when eggs and sperm, respectively, were irradiated, while Curve C shows it when both eggs and sperm were irradiated. Curve D shows the effect which would have been obtained if the effects produced in sperm and eggs had been entirely additive. added to make the combinations mentioned. Insemination of the different samples was accomplished as nearly simultaneously as possible, never more than two minutes being required for this. Deter- mination of the cleavage time was then carried out according to the procedure described previously. A series of nine experiments have been carried out, all of which show essentially the same thing. Averaged results for three of these, carried out under precisely the same conditions, are shown in Hg. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
