Improvement Era, Vol. 7

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Excerpt from Improvement Era, Vol. 7: June, 1904The light which passes through the lenses of the telescope rand microscope, is the light which is ordinarily recognized by the eye. The instruments effect no change in the light, they merely arrange the waves so as to produce a clear and distinct outline of the objects from which the light comes. Likewise, the sound waves entering the ear-trumpet are in nowise changed in their essential nature, but are simply rearranged or concentrated to produce a more definite impression on the ear. Instruments similar to those here mentioned are the simplest aids to man's senses.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.