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[
I. THE BRITISH MUSEUM ]
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II. THE ROYAL SOCIETY OF LONDON FOR IMPROVING NATURAL KNOWLEDGE ]
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III. THE ROYAL INSTITUTION AND THE LOW-TEMPERATURE RESEARCHES ]
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IV. SOME PHYSICAL LABORATORIES AND PHYSICAL PROBLEMS ]
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V. THE MARINE BIOLOGICAL LABORATORY AT NAPLES ]
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VI. ERNST HAECKEL AND THE NEW ZOOLOGY ]
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VII. SOME MEDICAL LABORATORIES AND MEDICAL PROBLEMS ]
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VII. SOME UNSOLVED SCIENTIFIC PROBLEMS ]
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IX. RETROSPECT AND PROSPECT ]
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