Excerpt from The Microscope, Vol. 9: An Illustrated Monthly Journal Devoted to Microscopical Science; January, 1889 All remittances promptly acknowledged. To insure answer, letters of Inquiry, not intended for publication, must inclose a two cent stamp. Authors of papers will be supplied with 25 reprints free, when the desire for such is stated on the manuscript. Specimens for examination should be sent to the Microscope Laboratory. 25 Washington Avenue, Detroit, Michigan. In all cases the transportation charges on these specimens must be prepaid. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.