Download or read book The Journal of Experimental Zoology 1919 Vol 28 Classic Reprint written by Ross G. Harrison and published by Forgotten Books. This book was released on 2019-01-16 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1919, Vol. 28 Fig 1 The nitrogen cycle (from Bayliss). The accessory lines and circles in are my additions based on evidence in this paper. 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.

Download or read book The Journal of Experimental Zoology 1919 written by Ross G. Harrison and published by Forgotten Books. This book was released on 2015-06-16 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1919, Vol. 28 Throughout the whole organic world the essential food element most difficult to acquire is nitrogen, as all nitrogen must ultimately come from the atmosphere and the power of combining with this gas is limited to a few microorganisms. Upon the nitrifying bacteria, then, all higher plants and animals are dependent for their nitrogen which is handed from one organism to another, linking all together into one great interdependency which has been called the nitrogen cycle. I insert a diagram from Bayliss which clearly illustrates this cycle. The accessory circles and the lines that connect them are additions based on my experiments. The search of the insect for nitrogen is very complicated and has been, at times, obscure. Indeed, little definite information is at hand concerning the food requirements in general of these organisms, as the material consumed is often in large part merely the substratum for a small amount of assimilable food. 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.

Download or read book The Journal of Experimental Zoology 1921 Vol 33 Classic Reprint written by Ross G. Harrison and published by Forgotten Books. This book was released on 2018-02-06 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1921, Vol. 33 The following-experiments were carried out at the University of Chicago during the years 1917 to 1919. I am deeply indebted to Professor Lillie for his invaluable suggestions and criticisms during the course of the work and for his generosity in Supplying me with numerous materials used in the experiments. I also wish to express my thanks to Dr. L. H. Hyman for revising the manuscript. 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.

Download or read book The Journal of Experimental Zoology Vol 27 written by Ross G. Harrison and published by Forgotten Books. This book was released on 2016-09-27 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, Vol. 27: 1918-1919 While the sex ratios for the inbred litters of the eighth to the twenty-fifth generations varied considerably, the variation was much less after the twelfth generation than before (table A part of this variation was doubtless phenotypic, Since seasonal changes in temperature seem to alter the sex ratio in the rat (king and Stotsenburg, and probably also other agencies, such as the age of the mother (king, '16 a), have a similar effect. As all of the sex ratios were relatively high, however, the devia tions from the norm cannot be ascribed either to environment or to chance, so they must have been due, in part at least, to the manner in which the breeding animals were selected. 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.

Download or read book The Journal of Experimental Zo logy 1918 1919 Vol 27 Classic Reprint written by Wistar Institute Of Anatomy And Biology and published by Forgotten Books. This book was released on 2018-02 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoölogy, 1918-1919, Vol. 27 Showing, by generation groups, the sex ratios in the inbred and in the half-inbred letters of the A series (male line) 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.

Download or read book The Journal Of Experimental Zoology written by Ross Granville Harrison and published by Wentworth Press. This book was released on 2019-03-24 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book The Journal of Experimental Zoology 1916 Vol 21 Classic Reprint written by Ross Granville Harrison and published by Forgotten Books. This book was released on 2018-10-03 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1916, Vol. 21 The previous studies on the influence Of the nervous system upon regeneration have given very divergent results which can hardly be reconciled even when the fact that widely separated groups Of animals were used as the material for experimentation is taken into consideration. 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.

Download or read book The Journal of Experimental Zoology 1918 Vol 24 Classic Reprint written by Ross G. Harrison and published by Forgotten Books. This book was released on 2018-02-02 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1918, Vol. 24 No attempt to review or abstract from the literature the facts relating to dedifferentiation in metazoa will be made. This has been done in an excellent summary and review by Schultz Schultz formulated the observations on metazoa in terms of the hypothesis that all phenomena of form regulation are somehow related to and a result of the reversal of differentiation or de differentiation. In other words regeneration is a result of the differentiation of dedifferentiated cells (see also Child. 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.

Download or read book The Journal of Experimental Zo logy 1919 Vol 29 Classic Reprint written by Ross G. Harrison and published by Forgotten Books. This book was released on 2018-02-06 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1919, Vol. 29 A layer Of paraffin blackened with carbon was put into a Syracuse Watch-glass and in it were made six grooves, each sufficiently wide to admit an embryo lying ventral side up. After the thyroid gland was removed the embryo was left in position for about an hour or until five other operations had been performed, the first then being removed to make room for the seventh. By that time the wound had sufficiently healed to permit handling with a pipette. Asepsis was found to be unneccessary. The operations were performed under a binocular microscope. A transverse incision was made with fine scissors through the ectoderm posterior to the oral plate, the flap Of ectoderm covering the thyroid anlage was pulled caudally, the mesenchyma pushed laterally or removed, and the exposed anlage Of the thyroid was removed together with that portion Of the ventral wall of the pharynx surrounding its proximal margin. The thyroid being Opaque is readily distinguished from the translucent mesenchyma. Care must be taken to avoid injury to the pericardium and heart. Usually the wound appeared to be healed in two or three hours. After the Operation (one to two hours) the salt solution was gradually diluted with tap-water. It was found that the em bryos were harmed by being left too long in the saline. Many sylvatica larvae were kept together in the same aquarium, but the Amblystoma larvae were isolated to prevent their eating one another's gills. 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.

Download or read book Journal of Experimental Zoology 1928 Vol 15 Classic Reprint written by William Keith Brooks and published by Forgotten Books. This book was released on 2018-02-06 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Journal of Experimental Zoology, 1928, Vol. 15 Francis B. Sumner. The effects of atmospheric temperature upon the body temperature of mice. Three figures. 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.

Download or read book The Journal of Experimental Zoology 1943 Vol 25 Classic Reprint written by Ross G. Harrison and published by Forgotten Books. This book was released on 2018-02-08 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1943, Vol. 25 This study has been carried a little further and included other birds with abnormal sex behavior, but normal structure. That is, to complete the more female end Of the series, we have studied several apparently normal hens that tread other hens. Of these, 1422 was sent from West Virginia by Professor Atwood as a pos sible hermaphrodite but has behaved normally 'in Maine. K134 and m4o8 were two such birds reared at the Station plant and finally killed to study their anatomy and histology. TO complete the more male end Of the series we have studied two guinea-chicken hybrids, one raised on the Maine poultry plant and the other sent in for examination from the country. Their gonads appeared to be testes, but their behavior was indifferent. 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.

Download or read book The Journal of Experimental Zoology Volume 28 written by William Keith Brooks and published by Palala Press. This book was released on 2015-09-21 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book The Journal of Experimental Zoology Volume 31 written by William Keith Brooks and published by Palala Press. This book was released on 2015-12-07 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book The Journal of Experimental Zoology Volume V 28 written by Wistar Institute of Anatomy and Biology and published by Palala Press. This book was released on 2016-05-24 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book The Journal of Experimental Zoology 1912 Vol 12 Classic Reprint written by William E. Castle and published by Forgotten Books. This book was released on 2016-08-20 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1912, Vol. 12 But differences in the size of cells may be due, not to unequal cell division, but to unequal rates of division, or to unequal growth of cells subsequent to division. In some instances cells divide rarely and consequently become large, while adjoining cells divide frequently and therefore remain small. The fact that cells are not always of the same size at the time of division is one of capital importance for it shows conclusively that the factors which bring about cell division may be separated from those which cause growth. 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.

Download or read book Journal of Experimental Zoology 1904 Vol 2 Classic Reprint written by William Keith Brooks and published by Forgotten Books. This book was released on 2018-01-22 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Journal of Experimental Zoology, 1904, Vol. 2 Flattening at the time of conjugation Correlation In breadth In pairs after separation Correlation in breadth not due to equalization. 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.

Download or read book The Journal of Experimental Zoology 1936 Vol 20 Classic Reprint written by Ross G. Harrison and published by Forgotten Books. This book was released on 2018-02-04 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Journal of Experimental Zoology, 1936, Vol. 20 In a recent paper1 I reported an attempt to obtain a modified clone of Hydra Viridis by the continued selection of variates dif fering in the number of tentacles. In that experiment a clone was bred from a single wild polyp and two groups of its descend ants, each composed of 25 lines, were selected for variations in tentacle number in opposite directions from the mean of the clone. Selection was continued for several generations, then the number of tentacles of all buds produced by the last selected gen eration of the 50 lines was recorded and the averages of the two groups were compared. A slight difference, in the direction of selection, was found in the averages of the earlier buds of the two groups but this difference did not persist in the buds pro duced later by the same parents; regression was complete in a single generation. 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.