This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...nuclei, the form and structure of which is more correctly shown in the right half of the roof wall, which in the section is cut transversely, while the left half, owing to the folding, is shown as cut obliquely. In C of figure 23 (rat No. 99, 6 days), there is shown a greatly compressed blastodermic vesicle, taken from ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...nuclei, the form and structure of which is more correctly shown in the right half of the roof wall, which in the section is cut transversely, while the left half, owing to the folding, is shown as cut obliquely. In C of figure 23 (rat No. 99, 6 days), there is shown a greatly compressed blastodermic vesicle, taken from a series of cross sections of the uterine horn. In this figure there is reproduced the fifth of a series of 10 sections of 10 n thickness; therefore, the third dimension of the vesicle is approximately 100 n. It is evident that had this vesicle been cut in a favorable plane at right angles to the present series, or parallel to the mesometrial plane, its form would have approached that of a circle. I have in my possession one vesicle of this stage of devlopment, similarly compressed, cut parallel to the plane of compression, in which almost the entire roof falls within a single section of 10 M thickness. The structure of the vesicle shown in C is very similar to that shown in A and B of this figure. The normal form of this vesicle is quite readily reconstructed from a study of the series of sections into which it has been cut. The cells of the yolk entoderm are evident. The parietal or transitory ectoderm constituting the roof consists of a single layer of much flattened cells, with relatively few nuclei, having, as seen in cross section, a long ovoid form, which, when seen in surface view present a regular, nearly circular outline (see lowermost nucleus in the figure). In similarly compressed vesicles cut parallel to the plane of compression, the germ disc may appear as consisting of three to four layers of cells. In an imaginary section passing in a plane at right angles to that figured in C, and having perhaps a slight obliquity, the germ d...
Read Less
Add this copy of The Development of the Albino Rat, Mus Norvegicus to cart. $45.62, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Kessinger Publishing.
