Gas burner with blue flame

Gas burner with a blue flame: No. 9827. Declared.05/01/1903.Issue 02/28/1905 / FR.Siemens.- [B.M .: B. and., 1905].-223-224 p., 1 l.Il .. -Description of a gas burner with a blue flame.To the privilege of a foreigner fr.Siemens (Fr. Siemens), in the city of Dresden, in Germany, declared on May 1, 1903.Group X. No. 9827. February 28, 1905.I. Siemens, FR..1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS