As in college, so in the quiet Swiss village, Agassiz soon gathered about him a group of scientific men as his students and assistants, many of whom in later life became themselves naturalists of reputation. It was a “scientific factory” of which Agassiz was the mainspring. He was poor, but somehow he managed to go on, supporting many of his staff in his own house, printing and lithographing his own publications, and supporting his own family as well, for his marriage had now brought additional responsibilities upon his broad shoulders. It was an unstable basis, but in one way or another Agassiz found the means to proceed. Money was but the means to an end, never the end itself. “I cannot spend my time in making money!” he once said when a profitable business offer was made to him. The remark expressed clearly his firm devotion to his chosen profession. It was during this period of his life that Agassiz added to scientific knowledge the proof that at some remote time in the earth’s existence vast glaciers, moving fields of ice miles in area and often hundreds of feet in thickness, had played a part in the earth’s formation almost as important as the recognized agents, fire and water. It was a geological discovery the proof of which, although indisputable, seemed so startling, that it was with difficulty that it was accepted even by the best scientific minds of the day. In the Alpine country had been found great boulders dropped apparently by some strange force in fields far from the quarries of native rock from which they had been torn. Here also were moraines and dikes, great piles of loose gravel deposited by some unknown agency; and here also, where the bedrock was visible, could be seen deep furrows and scratches on the polished stone as if chiseled by a giant tool. Glaciers existed in the Alps, but it was hard for men to believe that glaciers had once existed where now were green fields and meadows. But Agassiz was not the man to endeavor to found a belief on unsupported theory, and only after six years of study of the glaciers and glacial traces in the Alps and actual observations on the glacier of the Aar, was he prepared to give his proofs of the theory to the scientific world.