| Summary: | Louis Agassiz published his "glacial theory " in Etudes sur les glaciers in October, 1840. Edward Hitchcock wrote approvingly of the theory in 1841 and reproduced some of the Agassiz plates. Professor Samuel St. John of Western Reserve College reproduced one of the Hitchcock glacier plates and wrote favorably of the theory and described glacial drift in general in the first geology textbook published in Ohio, in 1851 at Hudson. St. John's influence was particularly important in the career of his student, John Strong Newberry, the famous geologist. Newberry's interest in glacial deposits, and especially in the origin of kames, may be traced to St. John, his geology teacher. The first statement in Ohio of the hypothesis that "drift " had been deposited by an ice sheet was presented by Samuel St. John in what is probably the first Ohio textbook on geology. It was published at Hudson, Ohio, in 1851 (fig. 1). This book and St. John's classroom discussions contributed to the early interest in glacial phenomena so well exhibited in Ohio and soon to be so extensively described in publications by J. S. Newberry and other geologists of the Second
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