Excerpt from Northwestern Lancet, 1902, Vol. 22: A Semimonthly Medical JournalJoseph L. Bates, of Boston, improved the Holmes stereoscope by adding a narrow shaft with a sliding view holder, which permitted the pictures to be focussed quickly and at any posi tion on the shaft.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.

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