Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Observations on the changes of the air and the concomitant epidemical diseases, in the island of Barbadoes : to which is added a treatise on the putrid bilious fever, commonly called the yellow fever and such other diseases as are indigenous or endemial, in the West India islands, or in the torrid zone / by William Hillary. Public Domain Mark. Source: Wellcome Collection.