The Annual of the National Academy of Sciences for 1863-1865 is a book published by the National Academy of Sciences in 1865. This book contains a collection of scientific papers and research findings presented at the academy's annual meetings during the years 1863 to 1865. The topics covered in the book include astronomy, physics, chemistry, biology, geology, and engineering. The papers are written by various scientists and scholars from different fields of study. The book provides valuable insights into the scientific research and discoveries made during the mid-19th century in the United States. It is a significant historical document for anyone interested in the history of science and technology.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.