The Invisible Man (Unabridged‪)‬

Griffin is a scientist who theorizes that if a person's refractive index is changed to exactly that of air and his body does not absorb or reflect light, then he will be invisible. He successfully carries out this procedure on himself, but cannot become visible again, becoming mentally unstable as a result.

The Invisible Man by H.G. Wells was first published in Pearson's Magazine in 1897.