Report Of The National Academy Of Sciences For The Year 1888 Classic Reprint

Author : Walter B. Barrows
Publisher : Forgotten Books
ISBN 13 : 9780656088034
Total Pages : 156 pages
Book Rating : 4.0/5 (88 download)

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Download or read book Second Report of the Michigan Academy of Science for the Year Ending June 30, 1900 written by Walter B. Barrows and published by Forgotten Books. This book was released on 2018-02-08 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Second Report of the Michigan Academy of Science for the Year Ending June 30, 1900: Prepared Under the Direction of the Council Fundamentally the sperm is not alone the energizing, it is the actual being that continues the race. The ovum is primarily but the bricks and mortar, as it were, that the sperm, the builder, employs in the construction of the house. Coming, however, into such relation to this cell as to employ its machinery it necessarily is brought to the center and thus to the nucleus of the egg. Entangling this in its meshes, the female pro-nucleus is perforce incorporated in the plan. But the mechanism is not adapted to the utilization of so many chromosomes. There are twice as many as can be utilized by the ovular machinery. The remainder are therefore set aside, and, as only impedimenta in subsequent processes, are 'cast out as a second polar corpuscle. That this reducing division in both egg and sperm later occurs, by tachygenesis, before fertilization is but' an added safeguard to assure perfect cross-fertilization; for only thus can there be certainty of equal representation or, indeed, of one parent being at all represented in fertilization. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.