Studio portrait of David Gruenspecht and Rebecca Gruenspecht nee Hoffman with one of their young sons Portraits Family

Digital Image

Portrait of Walter Landauer Portraits Men

Digital Image

Calorimetric values of composite solid propellants

The calorimetric values of composite solid propellant based on polystyrene, polyphenolformaldehyde, poly(vinyl chloride) and carboxy-terminated polybutadiene were determined using combustion calorimetry in order to assess the uncertainities in their measurements. The dependence of the calorimetric values on various propellant composition was obtained. The stoichiometry of oxidizer and fuel in the propellant for complete combustion obtained experimentally were compared with the theoretical stoichiometry calculated based on the oxidizer decomposition.

Martin Riesenburger portrait portraits men

Martin Riesenburger (May 14, 1896 – Apr. 14, 1966) was Prediger (Preacher) for the Jewish community in Berlin-Weissensee throughout the Nazi era (protected by his gentile wife, Natalie Riesenburger). In 1953 he became Rabbi of the Jewish community in Berlin (East) and then Landesrabbiner of the German Democratic Republic.

Portrait of the Herzer family of Lwow (Lemberg) Portraits; Family

Verso: Standing l-r: Sigmund (Malka's husband), Sima, Friedka, Zosia, Bernard, Siko (Yehoshua); Sitting l-r: Malka, Esther (Tinka), Pinchas, Sara (Bernard's wife); Inset: Hedva and Tziza, Bernard and Sara's children circa 1931 ages 4 and 5

Portrait of Sophie Gottschalk seated holding a book Portraits Women

Digital Image

Portrait of Ursula Gottschalk; Hannover Portraits Women

Signed by photographer bottom right

Studio portrait of Elisabeth Gottschalk nee Steinfeld.

Digital Image

Portrait of Karl Gottschalk.

Digital Image

Portrait of Molling and Sanger (Loewy) families on vacation; Marienbad Portraits Family

Therese Molling (1890-1981) is in back row in white dress, to her left is her mother Henny Molling nee Meyerhof (1864-1934), her husband (and Therese's father) Adolf Molling (1865-1921) is posing on the grass in front.

Reproduction of painted portrait of Marcus Elias Marcus, age 76. Portraits Men

Digital Image

Studio portrait of Franz Matthiesen; London Portraits Men

Digital Image