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THE AMERICAN NATURALIST VOL. XXVIII. February, 1894. 326 SOME RECENT CHEMICO-PHYSIOLOGICAL DISCOVERIES REGARDING THE CELL.1 BY R. H. CHITTENDEN. In opening this discussion, or rather in making such remarks as seem appropriate in connection with the subject before us for consideration this morning, I am reminded that the chemistry and the chemical processes of the cell have received very little attention from the generality of biologists. This is perhaps natural, since the morphological side of biology has for many years presented a more attractive field for the majority of scientific workers, and the difficulties have not been so great as in the chemical and physiological problems awaiting solu tion. Simplicity of structure, as embodied in the single cell of a unicellular organism, means to the physiologist increased complexity of function. In the higher organism with its many groups of cells, we can easily comprehend how one group may be characterized by one line of functional activity, while a neighboring group of cells in the form of another tissue or organ is endowed with functional activity of quite a different order. One group of cells is set apart for one line of duties, while another group has quite different functions; in other The Introductory paper in a discussion of our present knowledge of the cell at the meeting of the American Society of Naturalists, New Haven, Dec. 28, 1893. |