These items contain observations made at Gettysburg, Pennsylvania. The entries for January 1860-September 1865 are duplicates. One series was made under the direction of the Smithsonian Institution and is on the printed forms supplied by that institution. With this are: 2 memoranda by Michael, undated; 2 broadsides, Pennsylvania College of Gettysburg. Order of exercises; April 15, 1851; and Smithsonian institution. Registry of periodical phenomena...