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Elizabeth Cary Agassiz, Louis Agassiz: his life and correspondence, third edition, Chapter 21: 1865-1868: Aet. 58-61. (search)
The shoals of the southern coast of Massachusetts have been surveyed, and their position is now known with great accuracy; but their internal structure, their mode of formation, is only imperfectly ascertained, owing to the difficulty of cutting into them and examining in situ the materials of which they are composed. Nothing, on the contrary, is easier than to explore the structure or composition of drift hills which are cut through by all our railroad tracks. Now the shoals and rips of Nantucket have their counterparts on the main-land; and even along the shores of Boston Harbor, in the direction of Dorchester and Milton, such shoals may be examined, far away from the waters to which they owe their deposits. Here, then, is the place to complete the exploration, for which soundings and dredgings give only imperfect information. I need not extend these remarks further in order to satisfy you of the importance of geological and zoological researches in connection with the regula