Description
"Tentamen medicum inaugurale de viribus opii" by Samuel Bard (1765).
Related Subjects
The graph displays the other subjects mentioned on the same pages as the subject "essay upon opium". If the same subject occurs on a page with "essay upon opium" more than once, it appears closer to "essay upon opium" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.