Author: Arthur Milnes Marshall
Publisher:
Published: 1891
Total Pages: 122
ISBN-13:
DOWNLOAD EBOOK →Author: A. Milnes Marshall
Publisher: Forgotten Books
Published: 2017-10-29
Total Pages: 116
ISBN-13: 9780266924395
DOWNLOAD EBOOK →Excerpt from Descriptive Catalogue of the Embryological Models The spawning period commences in early spring, towards the end of March, and continues throughout the summer. The eggs are laid by the female in the evening, about an hour after sunset, and are fertilised at once by spermatozoa shed over them by the male. Development commences about an hour after fertilisation is effected, and proceeds with great rapidity: by sunrise on the following morning the embryo has reached the stage shown ih-model 13, at which period it works its way out of the egg membrane, and swims freely. Twenty-four hours later it has reached the stage shown in models 23 to 25: and a few hours later still, i.e., about thirty-six hours from the time of fertilisation, the mouth and first gill cleft are formed. The extreme rapidity with which the early stages of development are passed through is to be associated with the very small size of the egg, and the small amount of food yolk present in it. 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.
Author: Manchester Museum (University of Manchester)
Publisher:
Published: 1891
Total Pages:
ISBN-13:
DOWNLOAD EBOOK →Author: Soraya de Chadarevian
Publisher: Stanford University Press
Published: 2004
Total Pages: 492
ISBN-13: 9780804739726
DOWNLOAD EBOOK →Now that '3-D models’ are so often digital displays on flat screens, it is timely to look back at the solid models that were once the third dimension of science. This book is about wooden ships and plastic molecules, wax bodies and a perspex economy, monuments in cork and mathematics in plaster, casts of diseases, habitat dioramas, and extinct monsters rebuilt in bricks and mortar. These remarkable artefacts were fixtures of laboratories and lecture halls, studios and workshops, dockyards and museums. Considering such objects together for the first time, this interdisciplinary volume demonstrates how, in research as well as in teaching, 3-D models played major roles in making knowledge. Accessible and original chapters by leading scholars highlight the special properties of models, explore the interplay between representation in two dimensions and three, and investigate the shift to modelling with computers. The book is fascinating reading for anyone interested in the sciences, medicine, and technology, and in collections and museums.
Author: Indian Museum. Library
Publisher:
Published: 1905
Total Pages: 386
ISBN-13:
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