Variations and Genetic Relationships of the Garter-snakes
Variations and Genetic Relationships of the Garter-snakes

Author: Alexander Grant Ruthven

Publisher: Legare Street Press

Published: 2023-07-18

Total Pages: 0

ISBN-13: 9781022215962

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A scientific study of the genetic variations among garter snakes in North America, focusing on the relationships between different subspecies and populations. Includes detailed genetic analyses and maps of the snakes' ranges. 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 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. 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.

VARIATIONS & GENETIC RELATIONS
VARIATIONS & GENETIC RELATIONS

Author: Alexander Grant 1882-1971 Ruthven

Publisher: Wentworth Press

Published: 2016-08-27

Total Pages: 238

ISBN-13: 9781363788149

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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.

Variations and Genetic Relationships of the Garter-Snakes (Classic Reprint)
Variations and Genetic Relationships of the Garter-Snakes (Classic Reprint)

Author: Alexander G. Ruthven

Publisher:

Published: 2016-06-27

Total Pages: 222

ISBN-13: 9781332799329

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Excerpt from Variations and Genetic Relationships of the Garter-Snakes Three steps are necessary to determine the genetic relationships and simplify Cope's elaborate arrangement of the group: (1) The value of the characters must be determined; (2) the geographic prob abilities must be utilized; (3) similarities and intergradations must be sought. It may seem super uous to insist upon the determination of the value of the characters used in systematic work on this group, for good characters, i. E., those which are constant within particular groups, are sought after by most systematists in forming their taxo nomic groups, but in the sense in which it is here used this rule means more than this, in that it also requires the discovery of the significance of the variations. 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."

Landscapes and Labscapes
Landscapes and Labscapes

Author: Robert E. Kohler

Publisher: University of Chicago Press

Published: 2010-11-15

Total Pages: 343

ISBN-13: 0226450112

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What is it like to do field biology in a world that exalts experiments and laboratories? How have field biologists assimilated laboratory values and practices, and crafted an exact, quantitative science without losing their naturalist souls? In Landscapes and Labscapes, Robert E. Kohler explores the people, places, and practices of field biology in the United States from the 1890s to the 1950s. He takes readers into the fields and forests where field biologists learned to count and measure nature and to read the imperfect records of "nature's experiments." He shows how field researchers use nature's particularities to develop "practices of place" that achieve in nature what laboratory researchers can only do with simplified experiments. Using historical frontiers as models, Kohler shows how biologists created vigorous new border sciences of ecology and evolutionary biology.