New York: Spencer Optical M'f'g Co. 84,  pages. Maroon pebbled cloth with gilt stamped lettering. Hinges cracked, upper corner rear board creased, cloth detaching at edges from the substrate. An exlibrary copy from the Hartford Medical Society library (properly deaccessioned), with large bookplate on front pastedown, perforated stamp to title page and at least one text page, and a few additional markings. Includes a large fold-out chart that anyone who has taken an eye exam will relate to. While undated, there is an MS Bradley Yale University '89S pencilled on the front endpaper, and a gift notation that he gave the book to Hartford in 1936. Worldcat notes 8 copies as of this listing, and a date of 1883. Spencer Optical was a manufacturer of many optics related items for the medical field. In the rear are several instruments by Spencer with illustrations and how to use them, both handheld items related to ophthalmic applications. Scarce in the marketplace. Good. Cloth.