Results for 'Biology. '

953 found
Order:
  1. (1 other version)The Importance of Feminist Critique for Contemporary Cell Biology.the Biology Group & Gender Study - 1988 - Hypatia 3 (1):61-76.
    Biology is seen not merely as a privileged oppressor of women but as a co-victim of masculinist social assumptions. We see feminist critique as one of the normative controls that any scientist must perform whenever analyzing data, and we seek to demonstrate what has happened when this control has not been utilized. Narratives of fertilization and sex determination traditionally have been modeled on the cultural patterns of male/female interaction, leading to gender associations being placed on cells and their components. We (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   19 citations  
  2. Against Biological Determinism the Dialects of Biology Group.Steven P. R. Rose & Dialects of Biology Group - 1981
     
    Export citation  
     
    Bookmark  
  3.  40
    Transforming Traditions in American Biology, 1880-1915.Jane Maienschein & Regents' Professor President'S. Professor and Parents Association Professor at the School of Life Sciences and Director Center for Biology and Society Jane Maienschein - 1991
  4.  22
    Against Biological Determinism.Steven Peter Russell Rose & Dialectics of Biology Group (eds.) - 1982 - New York, N.Y.: Distributed in the USA by Schocken Books.
  5.  56
    Data-Centric Biology: A Philosophical Study.Sabina Leonelli - 2016 - London: University of Chicago Press.
  6. Discovery and explanation in biology and medicine.Kenneth F. Schaffner - 1993 - Chicago: University of Chicago Press.
    Kenneth F. Schaffner compares the practice of biological and medical research and shows how traditional topics in philosophy of science—such as the nature of theories and of explanation—can illuminate the life sciences. While Schaffner pays some attention to the conceptual questions of evolutionary biology, his chief focus is on the examples that immunology, human genetics, neuroscience, and internal medicine provide for examinations of the way scientists develop, examine, test, and apply theories. Although traditional philosophy of science has regarded scientific discovery—the (...)
    Direct download  
     
    Export citation  
     
    Bookmark   229 citations  
  7. The Biology of Moral Systems.[author unknown] - 1987 - Tijdschrift Voor Filosofie 54 (2):343-343.
    No categories
     
    Export citation  
     
    Bookmark   93 citations  
  8. Evolutionary biology meets consciousness: essay review of Simona Ginsburg and Eva Jablonka’s The Evolution of the Sensitive Soul.Heather Browning & Walter Veit - 2021 - Biology and Philosophy 36 (1):1-11.
    In this essay, we discuss Simona Ginsburg and Eva Jablonka’s The Evolution of the Sensitive Soul from an interdisciplinary perspective. Constituting perhaps the longest treatise on the evolution of consciousness, Ginsburg and Jablonka unite their expertise in neuroscience and biology to develop a beautifully Darwinian account of the dawning of subjective experience. Though it would be impossible to cover all its content in a short book review, here we provide a critical evaluation of their two key ideas—the role of Unlimited (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   8 citations  
  9.  80
    Studies in the Philosophy of Biology: Reduction and Related Problems : [papers Presented at a Conference on Problems of Reduction in Biology Held in Villa Serbe, Bellagio, Italy 9-16 September 1972.Francisco Jose Ayala & Theodosius Dobzhansky (eds.) - 1974 - Berkeley: University of California Press.
    Should the philosophy of biology deal with organismic, or with molecular aspects , or with both ? We are, of course, not the first to appreciate the ...
    Direct download  
     
    Export citation  
     
    Bookmark   48 citations  
  10.  56
    In Mendel’s Mirror: Philosophical Reflections on Biology.Philip Kitcher - 2003 - New York: Oxford University Press.
    Philip Kitcher is one of the leading figures in the philosophy of science today. Here he collects, for the first time, many of his published articles on the philosophy of biology, spanning from the mid-1980's to the present. The book's title refers to Gregor Mendel, an Augustinian monk who was one of the first scientists to develop a theory of heredity. Mendel's work has been deeply influential to our understanding of our selves and our world, just as the study of (...)
  11.  90
    Biology as ideology: the doctrine of DNA.Richard C. Lewontin - 1991 - New York, NY: HarperPerennial.
    Following in the fashion of Stephen Jay Gould and Peter Medawar, one of the world's leading scientists examines how "pure science" is in fact shaped and guided by social and political needs and assumptions.
    Direct download  
     
    Export citation  
     
    Bookmark   98 citations  
  12. Molecular biology vs. organicism: The enduring dispute between mechanism and vitalism.Hilde Hein - 1969 - Synthese 20 (2):238 - 253.
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   6 citations  
  13. (1 other version)Processes of Life: Essays in the Philosophy of Biology.John Dupré - 2011 - Oxford, GB: Oxford University Press.
    John Dupr explores recent revolutionary developments in biology and considers their relevance for our understanding of human nature and society. He reveals how the advance of genetic science is changing our view of the constituents of life, and shows how an understanding of microbiology will overturn standard assumptions about the living world.
    Direct download  
     
    Export citation  
     
    Bookmark   70 citations  
  14.  43
    Biomimetic robots and biology.Allen I. Selverston - 2001 - Behavioral and Brain Sciences 24 (6):1077-1077.
    Using robots that operate in the real world as opposed to computer simulations of animal behavior is a form of modeling that may provide some biological insights. However, since engineering principles and materials differ significantly from those used in biology, one should be extremely cautious in interpreting robot biomimicry as providing an explanation of biological mechanisms.
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   29 citations  
  15. Philosophy of Biology.Elliott Sober - 1993 - Boulder, Colo.: Routledge.
    Perhaps because of it implications for our understanding of human nature, recent philosophy of biology has seen what might be the most dramatic work in the philosophies of the ?special? sciences. This drama has centered on evolutionary theory, and in the second edition of this textbook, Elliott Sober introduces the reader to the most important issues of these developments. With a rare combination of technical sophistication and clarity of expression, Sober engages both the higher level of theory and the direct (...)
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark   136 citations  
  16. Evolutionary Developmental Biology.Laura Nuño De La Nuño De La Rosa & G. Müller (eds.) - forthcoming - Springer.
    No categories
     
    Export citation  
     
    Bookmark   38 citations  
  17.  60
    The Diversity of Engineering in Synthetic Biology.Massimiliano Simons - 2020 - NanoEthics 14 (1):71-91.
    A recurrent theme in the characterization of synthetic biology is the role of engineering. This theme is widespread in the accounts of scholars studying this field and the biologists working in it, in those of the biologists themselves, as well as in policy documents. The aim of this article is to open this black-box of engineering that is supposed to influence and change contemporary life sciences. Too often, both synthetic biologists and their critics assume a very narrow understanding of what (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   7 citations  
  18.  59
    Engineering and Biology: Counsel for a Continued Relationship.Brett Calcott, Arnon Levy, Mark L. Siegal, Orkun S. Soyer & Andreas Wagner - 2015 - Biological Theory 10 (1):50-59.
    Biologists frequently draw on ideas and terminology from engineering. Evolutionary systems biology—with its circuits, switches, and signal processing—is no exception. In parallel with the frequent links drawn between biology and engineering, there is ongoing criticism against this cross-fertilization, using the argument that over-simplistic metaphors from engineering are likely to mislead us as engineering is fundamentally different from biology. In this article, we clarify and reconfigure the link between biology and engineering, presenting it in a more favorable light. We do so (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   6 citations  
  19.  70
    Modeling complexity: cognitive constraints and computational model-building in integrative systems biology.Miles MacLeod & Nancy J. Nersessian - 2018 - History and Philosophy of the Life Sciences 40 (1):17.
    Modern integrative systems biology defines itself by the complexity of the problems it takes on through computational modeling and simulation. However in integrative systems biology computers do not solve problems alone. Problem solving depends as ever on human cognitive resources. Current philosophical accounts hint at their importance, but it remains to be understood what roles human cognition plays in computational modeling. In this paper we focus on practices through which modelers in systems biology use computational simulation and other tools to (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   8 citations  
  20. Teleological explanations in evolutionary biology.Francisco J. Ayala - 1970 - Philosophy of Science 37 (1):1-15.
    The ultimate source of explanation in biology is the principle of natural selection. Natural selection means differential reproduction of genes and gene combinations. It is a mechanistic process which accounts for the existence in living organisms of end-directed structures and processes. It is argued that teleological explanations in biology are not only acceptable but indeed indispensable. There are at least three categories of biological phenomena where teleological explanations are appropriate.
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   161 citations  
  21.  14
    The Principles of Biology.Herbert Spencer - 2015 - Williams & Norgate.
    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 (...)
    Direct download  
     
    Export citation  
     
    Bookmark   29 citations  
  22.  84
    Unifying biology: The evolutionary synthesis and evolutionary biology.V. B. Smocovitis - 1992 - Journal of the History of Biology 25 (1):1-65.
  23.  27
    Asking questions in biology: design, analysis, and presentation in practical work.C. J. Barnard - 1993 - New York, NY: Longman Scientific & Technical. Edited by Francis S. Gilbert & Peter K. McGregor.
    This lively book explores how to: Formulate hypotheses and predictions; Design critical observations and experiments to test them; Choose appropriate statistical analyses; Present results and write reports.
    Direct download  
     
    Export citation  
     
    Bookmark  
  24.  35
    Not in Our Genes: Biology, Ideology, and Human Nature.Michael Ruse & R. C. Lewontin - 1984 - Hastings Center Report 14 (6):42.
    Book reviewed in this article: Not In Our Genes: Biology, Ideology, and Human Nature. By R. C. Lewontin, Steven Rose, and Leon J. Kamin.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   258 citations  
  25.  27
    What makes biology unique?: considerations on the autonomy of a scientific discipline.Ernst Mayr - 2004 - New York: Cambridge University Press.
    This collection of revised and new essays argues that biology is an autonomous science rather than a branch of the physical sciences. Ernst Mayr, widely considered the most eminent evolutionary biologist of the 20th century, offers insights on the history of evolutionary thought, critiques the conditions of philosophy to the science of biology, and comments on several of the major developments in evolutionary theory. Notably, Mayr explains that Darwin's theory of evolution is actually five separate theories, each with its own (...)
    Direct download  
     
    Export citation  
     
    Bookmark   73 citations  
  26. Molecular biology and the unity of science.Harold Kincaid - 1990 - Philosophy of Science 57 (4):575-593.
    Advances in molecular biology have generally been taken to support the claim that biology is reducible to chemistry. I argue against that claim by looking in detail at a number of central results from molecular biology and showing that none of them supports reduction because (1) their basic predicates have multiple realizations, (2) their chemical realization is context-sensitive and (3) their explanations often presuppose biological facts rather than eliminate them. I then consider the heuristic and confirmational implications of irreducibility and (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   47 citations  
  27. Noological argument 2.6.Searle'S. Biological Naturalism - 2002 - In William Lane Craig (ed.), Philosophy of religion: a reader and guide. New Brunswick, N.J.: Rutgers University Press. pp. 15--155.
    No categories
     
    Export citation  
     
    Bookmark  
  28.  21
    Evolution as entropy: toward a unified theory of biology.D. R. Brooks - 1988 - Chicago: University of Chicago Press. Edited by E. O. Wiley.
    "By combining recent advances in the physical sciences with some of the novel ideas, techniques, and data of modern biology, this book attempts to achieve a new and different kind of evolutionary synthesis. I found it to be challenging, fascinating, infuriating, and provocative, but certainly not dull."--James H, Brown, University of New Mexico "This book is unquestionably mandatory reading not only for every living biologist but for generations of biologists to come."--Jack P. Hailman, Animal Behaviour , review of the first (...)
    Direct download  
     
    Export citation  
     
    Bookmark   99 citations  
  29. Biology and ethics.Philip Kitcher - 2006 - In David Copp (ed.), The Oxford handbook of ethical theory. New York: Oxford University Press.
    This chapter outlines three programs that aim to use biological insights in support of philosophical positions in ethics: Aristotelian approaches found, for example, in Thomas Hurka and Philippa Foot; Humean approaches found in Simon Blackburn and Allan Gibbard; and biologically grounded approaches found in of Elliott Sober and Brian Skyrms. The first two approaches begin with a philosophical view, and seek support for it in biology. The third approach begins with biology, and uses it to illuminate the status of morality. (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   68 citations  
  30.  25
    The biology of science: An essay on the evolution of representational cognitivism.Arthur Still - 1986 - Journal for the Theory of Social Behaviour 16 (3):251–267.
  31.  19
    Evolutionary developmental biology offers a significant challenge to the neo-Darwinian paradigm.Manfred D. Laubichler - 2009 - In Francisco José Ayala & Robert Arp (eds.), Contemporary debates in philosophy of biology. Malden, MA: Wiley-Blackwell. pp. 199–212.
    This chapter contains sections titled: Introduction A Brief History of Developmental Explanations of Phenotypic Evolution Research Questions of Evo‐Devo Unifying Themes of the Conceptual Basis of Evo‐Devo Conclusion: A Mechanistic Theory of Evo‐Devo Challenges the Modern Synthesis Postscript: Counterpoint References.
    Direct download  
     
    Export citation  
     
    Bookmark   34 citations  
  32. Dreaming of a Universal Biology: Synthetic Biology and the Origins of Life.Massimiliano Simons - 2021 - Hyle: International Journal for Philosophy of Chemistry 27:91-116.
    Synthetic biology aims to synthesize novel biological systems or redesign existing ones. The field has raised numerous philosophical questions, but most especially what is novel to this field. In this article I argue for a novel take, since the dominant ways to understand synthetic biology’s specificity each face problems. Inspired by the examination of the work of a number of chemists, I argue that synthetic biology differentiates itself by a new regime of articulation, i.e. a new way of articulating the (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   3 citations  
  33.  58
    The problem of prediction in invasion biology.Alkistis Elliott-Graves - 2016 - Biology and Philosophy 31 (3):373-393.
    Invasion biology is a relatively young discipline which is important, interesting and currently in turmoil. Biological invaders can threaten native ecosystems and global biodiversity; they can incur massive economic costs and even introduce diseases. Invasion biologists generally agree that being able to predict when and where an invasion will occur is essential for progress in their field. However, successful predictions of this type remain elusive. This has caused a rift, as some researchers are pessimistic and believe that invasion biology has (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   11 citations  
  34.  22
    Aristotle's philosophy of biology: studies in the origins of life science.James G. Lennox - 2000 - New York: Cambridge University Press.
    In addition to being one of the world's most influential philosophers, Aristotle can also be credited with the creation of both the science of biology and the philosophy of biology. He was the first thinker to treat the investigations of the living world as a distinct inquiry with its own special concepts and principles. This book focuses on a seminal event in the history of biology - Aristotle's delineation of a special branch of theoretical knowledge devoted to the systematic investigation (...)
    Direct download  
     
    Export citation  
     
    Bookmark   49 citations  
  35. Towards a Constructivist Systems Biology? Review of: F. C. Boogerd et al. (eds.) (2006) Systems Biology.H. Goorhuis - 2007 - Constructivist Foundations 3 (1):57-57.
    Summary: Based on the book, the overall impression is that systems biology struggles with the limits of first-order cybernetics and tries to overcome it by mixing bottom up and top down methods from classical approaches such as genetics, molecular biology and enzymology. However, the contributors avoid the step from first-order to second-order cybernetics.
     
    Export citation  
     
    Bookmark  
  36. Standard Aberration: Cancer Biology and the Modeling Account of Normal Function.Seth Goldwasser - 2023 - Biology and Philosophy 38 (1):(4) 1-33.
    Cancer biology features the ascription of normal functions to parts of cancers. At least some ascriptions of function in cancer biology track local normality of parts within the global abnormality of the aberration to which those parts belong. That is, cancer biologists identify as functions activities that, in some sense, parts of cancers are supposed to perform, despite cancers themselves having no purpose. The present paper provides a theory to accommodate these normal function ascriptions—I call it the Modeling Account of (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  37.  16
    Romantic Biology, 1890–1945.Maurizio Esposito - 2014 - Routledge.
    In this book, Esposito presents a historiography of organicist and holistic thought through an examination of the work of leading biologists from Britain and America. He shows how this work relates to earlier Romantic tradition and sets it within the wider context of the history and philosophy of the life sciences.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   14 citations  
  38.  52
    General Relativistic Biology.Noah Greenstein - manuscript
    This paper presents an alternative conceptual foundation for biological evolution. First the causal and statistical perspectives on evolutionary fitness are analyzed, finding them to implicitly depend on each other, and hence cannot be individually fundamental. It is argued that this is an instance of a relativistic perspective over evolutionary phenomena. New accounts of fitness, the struggle for life, and Natural Selection are developed under this interpretation. This biological relativism is unique in that it draws from General Relativity in physics, unlike (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  39. A semiotical reflection on biology, living signs and artificial life.Claus Emmeche - 1991 - Biology and Philosophy 6 (3):325-340.
    It is argued, that theory sf signs, especially in the tradition of the great philosopher Charles Sanders Peirce (1839–1914) can inspire the study of central problems in the philosophy of biology. Three such problems are considered: (1) The nature of biology as a science, where a semiotically informed pluralistic approach to the theory of science is introduced. (2) The peculiarity of the general object of biology, where a realistic interpretation of sign- and information-concepts is required to see sign-processes as immanent (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   30 citations  
  40.  40
    The Ethics of Synthetic Biology: Next Steps and Prior Questions.Gregory E. Kaebnick, Michael K. Gusmano & Thomas H. Murray - 2014 - Hastings Center Report 44 (S5):4-26.
    A majority opinion seems to have emerged in scholarly analysis of the assortment of technologies that have been given the label “synthetic biology.” According to this view, society should allow the technology to proceed and even provide it some financial support, while monitor­ing its progress and attempting to ensure that the development leads to good outcomes. The near‐consensus is captured by the U.S. Presidential Commission for the Study of Bioethical Issues in its report New Directions: The Ethics of Synthetic Biology (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   13 citations  
  41.  74
    Synthetic biology and the search for alternative genetic systems: Taking how-possibly models seriously.Koskinen Rami - 2017 - European Journal for Philosophy of Science 7 (3):493-506.
    Many scientific models in biology are how-possibly models. These models depict things as they could be, but do not necessarily capture actual states of affairs in the biological world. In contemporary philosophy of science, it is customary to treat how-possibly models as second-rate theoretical tools. Although possibly important in the early stages of theorizing, they do not constitute the main aim of modelling, namely, to discover the actual mechanism responsible for the phenomenon under study. In the paper it is argued (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   14 citations  
  42.  64
    Philosophy of Biology: A Very Short Introduction.Samir Okasha - 2019 - Oxford: Oxford University Press.
    Covering some of science's most divisive topics, such as philosophical issues in genetics and evolution, the philosophy of biology also encompasses more traditional philosophical questions, such as free will, essentialism, and nature vs nurture. Here, Samir Okasha outlines the core issues with which contemporary philosophy of biology is engaged.
  43. Values, Advocacy and Conservation Biology.Jay Odenbaugh - 2003 - Environmental Values 12 (1):55 - 69.
    In this essay, I examine the controversy concerning the advocacy of ethical values in conservation biology. First, I argue, as others have, that conservation biology is a science laden with values both ethical and non-ethical. Second, after clarifying the notion of advocacy at work, I contend that conservation biologists should advocate the preservation of biological diversity. Third, I explore what ethical grounds should be used for advocating the preservation of ecological systems by conservation biologists. I argue that conservation biologists should (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   16 citations  
  44.  90
    Institutionalizing molecular biology in post-war Europe: a comparative study.Bruno J. Strasser - 2002 - Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences 33 (3):515-546.
    The intellectual origins of molecular biology are usually traced back to the 1930s. By contrast, molecular biology acquired a social reality only around 1960. To understand how it came to designate a community of researchers and a professional identity, I examine the creation of the first institutes of molecular biology, which took place around 1960, in four European countries: Germany, the United Kingdom, France, and Switzerland. This paper shows how the creation of these institutes was linked to the results of (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   12 citations  
  45.  24
    Biology, Ethics and Animals.R. G. Frey - 1994 - Philosophical Quarterly 44 (176):415-417.
    No categories
    Direct download  
     
    Export citation  
     
    Bookmark   5 citations  
  46.  2
    The physical foundation of biology.Walter M. Elsasser - 1958 - New York,: Pergamon Press.
  47. Theory structure and theory change in contemporary molecular biology.Sylvia Culp & Philip Kitcher - 1989 - British Journal for the Philosophy of Science 40 (4):459-483.
    Traditional approaches to theory structure and theory change in science do not fare well when confronted with the practice of certain fields of science. We offer an account of contemporary practice in molecular biology designed to address two questions: Is theory change in this area of science gradual or saltatory? What is the relation between molecular biology and the fields of traditional biology? Our main focus is a recent episode in molecular biology, the discovery of enzymatic RNA. We argue that (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   16 citations  
  48.  92
    Systems Biology and Mechanistic Explanation.Ingo Brigandt, Sara Green & Maureen A. O'Malley - 2017 - In Stuart Glennan & Phyllis McKay Illari (eds.), The Routledge Handbook of Mechanisms and Mechanical Philosophy. Routledge. pp. 362-374.
    We address the question of whether and to what extent explanatory and modelling strategies in systems biology are mechanistic. After showing how dynamic mathematical models are actually required for mechanistic explanations of complex systems, we caution readers against expecting all systems biology to be about mechanistic explanations. Instead, the aim may be to generate topological explanations that are not standardly mechanistic, or to arrive at design principles that explain system organization and behaviour in general, but not specific mechanisms. These abstraction (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   10 citations  
  49.  69
    Synthetic Biology Needs A Synthetic Bioethics.Paul B. Thompson - 2012 - Ethics, Policy and Environment 15 (1):1 - 20.
    Recent developments in synthetic biology are described and characterized as moving the era of biotechnology into platform technologies. Platform technologies enable rapid and diffuse innovations and simultaneous product development in diffuse markets, often targeting sectors of the economy that have traditionally been thought to have little relationship to one another. In the case of synthetic biology, pharmaceutical and biofuel product development are occurring interactively. But the regulatory and ethical issues associated with these two applications share very little overlap. As such, (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   15 citations  
  50. Synthetic biology and the ethics of knowledge.T. Douglas & J. Savulescu - 2010 - Journal of Medical Ethics 36 (11):687-693.
    Synthetic biologists aim to generate biological organisms according to rational design principles. Their work may have many beneficial applications, but it also raises potentially serious ethical concerns. In this article, we consider what attention the discipline demands from bioethicists. We argue that the most important issue for ethicists to examine is the risk that knowledge from synthetic biology will be misused, for example, in biological terrorism or warfare. To adequately address this concern, bioethics will need to broaden its scope, contemplating (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   28 citations  
1 — 50 / 953