SPeciaL PHYSICAL INSTRUMENTS--CATALOGS. COLLECTIONS Ritchie (Edward S.) & Sons, Boston. SCH Ritchie's illustrated catalogue of philo- -T860  sophical instruments, and school apparatus. -R51I Boston CA.Holland, 1860] x,84p.inel.front.,illus. 23.5em.
FOR OTHER EDITIONS see AUTHOR
1. Physical instruments--Catalogs. 2. Catalogs, Commercial--Massachusetts--Boston.
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