Excerpt from The Lichen Flora of the United States Through financial aid granted by the Trustees and the Research Committee of Miami University, it was possible for him to have the services of student assist ants. From 1925 to 1927 the writer assisted Professor Fink in the study of material and the writing of descriptions. This assistantship was financed by combining fellowship grants from the Society of Sigma Xi, grants from the American Associa tion for the Advancement of Science, and grants from Miami University. Grants were received by the writer from the Society of Sigma Xi in 1928, 1929, and 1930, and from the American Association for the Advancement of Science in 1928. After the death of Professor Fink in 192 7, the writer became an instructor in the Botany Department of Miami University and continued work on the manuscript. 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.