This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
naval mergen bottle acid yield research photo border Equipment used in naval stores research paper cup to catch the flow of gum acid bottle and balance to weigh the yield. Taken Francois Mergen . Equipment used in naval stores research paper cup to catch the flow of gum acid bottle and balance to weigh the yield. Taken Francois