. The American journal of anatomy. y 38 days Tandler, Anat. Anz.,xxi, 1907 28 27 days (?) No. 1461 10 60 49 days and earlier His 27 22 days (?) No. 443 11 55 31 days (?) Rahl, Entwickl 63 53 days and later His 14 65 Exactly 47 days Rahl 65 46 days and later No. 167 18 54 Exactly 47 days No. 1390 18 56 26 or 27 days (?) No. 1584 25 75 Exactly 56 days No. 26 26 65 56 days No. 616 28 62 55 days (?) No. 1535 31 69 57 days No. 373 82 77 days (?) No. 849 62 93 Not over 82 days No. 591 95 75 or 87 days (?) No. 1635 85(?) 95 days No. 322 87 94 82 or 84 days (?) N
. The American journal of anatomy. y 38 days Tandler, Anat. Anz.,xxi, 1907 28 27 days (?) No. 1461 10 60 49 days and earlier His 27 22 days (?) No. 443 11 55 31 days (?) Rahl, Entwickl 63 53 days and later His 14 65 Exactly 47 days Rahl 65 46 days and later No. 167 18 54 Exactly 47 days No. 1390 18 56 26 or 27 days (?) No. 1584 25 75 Exactly 56 days No. 26 26 65 56 days No. 616 28 62 55 days (?) No. 1535 31 69 57 days No. 373 82 77 days (?) No. 849 62 93 Not over 82 days No. 591 95 75 or 87 days (?) No. 1635 85(?) 95 days No. 322 87 94 82 or 84 days (?) No. 1295c 95 104 89 days (?) No. 1310 121 120 Not over 112 days No. 984 142 129 Not over 109 days No. 1284 409 410 FRANKLIN P. MALL according to their degree of development as given by Triepel inorder to show that he has practically adopted the curve of de-velopment given by Bryce and Teacher and also by has really taken what I have designated as the copulationage, minus about two days for each stage, assuming, as do also. 7p 80 90 |I00 I DAYS 2 3 4 5 6 7 e 9 10 II 12 13 14 15 WEEKS Fig. 1 Menstruation age and copulation age taken from the curve constructedby me and published in the Manual of Human Embryology. All embryos areentered with CR length. I have also added for the sake of comparison the curvegiving the convention of His. NL and CR give the neck-rump and crown-rumplengths respectively, according to His. The fertilization age is according toBryce and Teacher for smaller embryos, and according to Triepel for larger dots record the menstrual age of the embryos under consideration, and thesquares the copulation age. The crossed squares mark the best records, as men-tioned in the text. It may be noted again that the curves are not constructed from these records,but the records are entered to test the curve. V AGE OF HUMAN EMBRYOS 411 TABLE 2 AtTTHOR CR LENGTH OFEMBRYO COPULATION AGE Bryce and Teacher 771771. days 16 Eternod 21 Tandl
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectanatomy
