Related Images
This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Looking for more info about this image?
Try a Google Reverse Image Search for it.
Try a Google Reverse Image Search for it.
Keywords from Image Description:
Patent drawings. en Patent drawings of Equatorial Sextant United States Patent Office United States Patent Office William Burt inventor PDUSGov Patent drawings William Austin Burt