. Carnegie Institution of Washington publication. A HUMAN EMBRYO OF TWENTY-FOUR PAIRS OF SOMITES, BY FRANKLIN PARADISE JOHNSON. INTRODUCTION. The embryo herein' described was received February 9, 1914, from Dr. W. L. Allee, of Eldon, Missouri. Accompanying the specimen was a letter with the following information, but no further data regarding its history are obtainable: The patient menstruated January 20 to January 25. Menstrual flow recommenced February 2, but it was freer and brighter in color than usual. On February 7 the speci- men was aborted. Less than five minutes after abortion it was
. Carnegie Institution of Washington publication. A HUMAN EMBRYO OF TWENTY-FOUR PAIRS OF SOMITES, BY FRANKLIN PARADISE JOHNSON. INTRODUCTION. The embryo herein' described was received February 9, 1914, from Dr. W. L. Allee, of Eldon, Missouri. Accompanying the specimen was a letter with the following information, but no further data regarding its history are obtainable: The patient menstruated January 20 to January 25. Menstrual flow recommenced February 2, but it was freer and brighter in color than usual. On February 7 the speci- men was aborted. Less than five minutes after abortion it was placed in 10 per cent formalin, in which fluid it was sent to Fni. 1.—Drawing showing pusitinn of cmlnyo in Hinrionic vc-M-lr. Si-ninn «J5 (of embryo). Xlo diameters. The chorionic vesicle appeared as an elongated rounded body, of a cream color and a very delicate texture. It measured 15 by 9 by 8 mm. Extending from end to end of the vesicle, a flat fold with a slit in it was visible. It was covered with villi everywhere except along the fold. For fear of ruining a valu- able embryo no attempt was made to open the sac. The whole vesicle was run 127. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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