The geologist of the present day, immersed in, and at times almost submerged by, the immense mass of new, and often valuable, material which continuously claims his attention, usually finds little time to glance back through the past centuries and follow the gradual evolution of his science from the point where it takes its origin among the ancient Greeks, through the later classical times and the Middle Ages to the Renaissance, when a new method for the study of nature was introduced, and thence on to the present day. This new method was that of close observation and experiment, instead of reliance on speculation and subservience to authority. With its introduction, science, as a whole, entered upon an era of vigorous growth and rapid expansion, ever increasing as the years went on, which has made it one of the dominating influences in the modern world.

A study of the . . .

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