The eyepiece of Ramsden

Okular Ramsden: No. 18416. Declared.12/07/1906.Issues on 01/31/1910 / "Karl Zeiss".- [B.M .: B. and., 1911].-257-258 p., 1 l.Il.: table .. -Description of the eyepiece of Ramsden.To the privilege of a foreign company "Carl Zeiss" (Carl Zeiss), in the city of Yen, in Germany, declared on December 7, 1906 (og. St. No. 30916).Group V. No. 18416. January 31, 1911.I. Zeiss Karl, company.Yena 1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS