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542 to the investigation of the Foraminifera and growing out of it, was the part which he took in the discussions respecting the nature of Eozoön Canadense, in which he maintained that the fossil in question exhibits the distinctive structure of the shell-substance of the higher Foraminiferæ. He was preparing a memoir on this subject, which he left uncompleted at the time of his death.

Dr. Carpenter, with Professor Wyville Thomson, was one of the prime movers of the expeditions for deep-sea research, which have since been so extensively carried on, and have resulted in so great and valuable additions to our knowledge of zoölogy and the physics of the globe. He took part in the earlier expeditions in 1868 and subsequent years, but was not able to go on the Challenger Expedition. He had an important part, however, in collating and formulating the results of the last expedition, and in making them accessible to the understanding of the public. To this series of investigations belong his theories and publications on ocean-currents.

In 1872 Dr. Carpenter was President of the British Association, at its Bristol meeting, and had the pleasure of announcing in his inaugural address the approaching departure of the Challenger on a circumnavigating expedition of at least three years' duration. The subject of his address was "Man as the Interpreter of Nature," and its purpose was to lead the minds of his audience "to the consideration of the mental processes by which are formed those fundamental conceptions of matter and force, of cause and effect, of law and order, which furnish the basis of all scientific reasoning, and constitute the philosophia prima of Bacon"; and to show "that those who set up their own conceptions of the orderly sequence which they discern in the phenomena of nature, as fixed and determinate laws, by which those phenomena not only are within all human experience, but always have been and always must be governed, are guilty of the intellectual arrogance they condemn in the systems of the ancients, and place themselves in diametrical antagonism to those real philosophers, by whose comprehensive grasp and penetrating insight that order has so far been disclosed." At the close of his address, having shown how man had arrived at the recognition of the unity of the power of which the phenomena of nature are the diversified manifestations, and how all scientific inquiry now tends toward this point, he declared that the science of modern times had taken a more special direction: "Fixing its attention exclusively on the order of nature, it has separated itself wholly from theology, whose function it is to seek after its cause. In this, science is fully justified, alike by the entire independence of its objects, and by the historical fact that it has been continually hampered and impeded, in its search for the truth as it is in nature, by the restraints which theologians have attempted to impose upon its inquiries. But when science, passing beyond its own limits, assumes to take the place of theology, and sets up its own conception of the order of nature as a