Signedon platform: Troughton & Simms, London
Inscribedon platform: Platina
FunctionThis is a micrometer eyepiece for a telescope.
Historical AttributesThis instrument was used by Harvard College Observatory, and was found at Agassiz Station in Harvard, Massachusetts in the Seismograph Station (est. 1908).
ProvenanceHarvard College Observatory; from Agassiz Station; transferred to CHSI.