Download or read book The American Journal of Science and Arts, Vol. 30 written by and published by Forgotten Books. This book was released on 2017-10-20 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The American Journal of Science and Arts, Vol. 30: 1860-1861; With an Index to Volumes 21-30, and Five Plates XXXIX. On the Optical Properties of the Picrate of Manganese by M. Carey lea, XL. On our inability from the Retinal impression alone to deter mine which Retina is impressed; by Prof. William B. Rogers. 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.