To view the item go to the Indiana University Archives at http://webapp1.dlib.indiana.edu/archivesphotos/results/item.do?itemId=P0027278&searchId=8&searchResultIndex=52
To view the item go to the Indiana University Archives at http://webapp1.dlib.indiana.edu/archivesphotos/results/item.do?itemId=P0067211&searchId=7&searchResultIndex=41
To view the full text of this item go to the Internet Archive at https://archive.org/stream/scientific-american-1881-12-17/scientific-american-v45-n25-1881-12-17#page/n5/mode/2up