X-ray of fish, 1896.

Early X-ray of two goldfish and a sea fish from 'Versuche Uber Photographie' by Dr Josef M Eder and E Valenta. X-ray or 'new' photography caused a sensation when it was discovered by German scientist Wilhelm Conrad Roentgen (1845-1923) in 1895. The X-rays were also called radiographs or cathode rays. Illustration from 'Versuche Uber Photographie' by Dr Josef M Eder and E Valenta, published in Vienna in 1896.