Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
A practical essay on hemeralopia, or night-blindness, commonly called nyctalopia : as it affects seamen and others, in the East and West Indies, China, the Mediterranean, and all tropical climates ; in which a successful method of curing the disease is detailed / by Mr. R.W. Bampfield ... ; communicated by Dr. Roget. Public Domain Mark. Source: Wellcome Collection.