London, England and Chicago, Illinois: Microscope Publications, Ltd. 1975. First Edition. xi, 147 pages. 8vo. Original yellow papered boards. No dust jacket as issued. INSCRIBED by Padgett on the front pastedown endpaper "To Madge and Rob with my very best wishes and sincere thanks, Donald L. Padgitt 3/19/76" A bright clean copy. Near Fine. Boards. 
A useful reference book on early American Microscope manufacturers, of use to collectors, institutions, historians, and dealers. With chapters on Charles A Spencer and his successors, The Grunow Brothers of New Haven, Joseph Zentmayer of Philadelphia, Robert B. Tolles and the Boston Optical Works, Chicago Makers (Bulloch and McIntosh), Bausch and Lomb of Rochester NY, Acme Optical Works of Lancaster PA and James W. Queen of Philadelphia, and a last chapter on another 20 or so makers or designers.