NLM logo

Digital Gallery Browse

Letter from Leonidas H. Berry to Dr. Owen J. Kealey, Ottawa, Canada, with advice

about what type of scoping instrument to purchase; states that there is no perfect instrument yet but recommends the one by Mr. Eder, for which Berry developed the so-called biopsy sheath; Berry notes that he has done about 400 biopsies

Courtesy National Library of Medicine

Page with typewritten text.