Signedunsigned
FunctionThese adaptors permitted one to use a non-Tolles objective (having threads) with a Tolles microscope having a bayonet mounting; or vice versa, to use a Tolles objective (having a bayonet mounting) with another maker's microscope requiring a threaded objective.
Historical AttributesFrom the Tolles - Dalton workshop. Presented by Charles X. Dalton around 1901 to Dr. Ernst.
ProvenanceTolles-Dalton workshop
Related WorksDeborah Jean Warner, "The Microscopes and Telescopes of Robert B. Tolles,"
Rittenhouse 9 (1995): 65-83.