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    <subfield code="a">On a piece of chalk (1868) -- The problems of the deep sea (1873) -- On some of the results of the expedition of H.M.S. "Challenger" (1875) -- Yeast (1871) -- On the formation of coal (1870) -- On the border territory between the animal and the vegetable kingdoms (1876) -- A lobster; or, The study of zoology (1861) -- Biogenesis and abiogenesis (1870) -- Geological contemporaneity and persistent types of life (1862) -- Geological reform (1869) -- Palaeontology and the doctrine of evolution (1870).</subfield>
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    <subfield code="a">"Discourses: Biological &amp; Geological" by Thomas Henry Huxley is a scientific publication written in the late 19th century. The book is a collection of essays and lectures where Huxley explores various concepts in biology and geology, putting forth insights regarding evolution, the formation of geological structures, and the connection between living organisms and their environments throughout history.  The opening of this volume serves as a preface in which Huxley discusses his motivations and experiences in popularizing scientific discourse. He emphasizes the challenges of making complex scientific ideas accessible to a general audience without sacrificing accuracy. He reflects on both the impact of public lectures on understanding science and the challenges posed by misconceptions that can arise from simplified expositions. Huxley also introduces his first essay on chalk, explaining its geological significance and hinting at its implications for understanding Earth's history. He promises to unravel the &#x201C;story&#x201D; of chalk&#x2014;a seemingly mundane subject&#x2014;and thereby reveals its profound connections to broader scientific concepts such as evolution and the historical progression of life on Earth. (This is an automatically generated summary.)</subfield>
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