3, 1971) and they subsequently married a year later August 8, 1906, in Marseille. Josef and Hulda had four children: Frank Hammar (born January 3, 1908, in Marseille - died October 27, 1974, in Motala), Master of Science at Kungliga Tekniska Högskolan. Managed Haile Selassie's radio station in Addis Ababa, in the mid 1930s. Later Managing Director of Standard radio & telefon AB Mireille Hammar (born April 21, 1909, in Stockholm - died July 29, 1959, in Stockholm), married the Swedish actor Olof Widgren Gösta Hammar (born May 29, 1911, in Stocksund - died November 6, 1978, in Västerås), coffee plantation owner in Dumbi-Cassongue, Angola Ulla Hammar (born November 4, 1912, in Stocksund - died April 9, 1987, in Marseille), married her cousin George Sylvander and moved to Marseille Back in Sweden When Hammar arrived back to Sweden he performed lectures and wrote the article "About the medical service in the Japanese third army" about his experiences from the Russio-Japanese war. Because he had unique experiences from warfare (not common in Sweden at that time) he was assigned as extra assistant at the Swedish Army Administration's healthcare agency 1905 - 1907. On commission from the Municipal av Stockholm he carries out studies on health in public schools 1906–1907. Hammar published at least two studies on why schoolchildren were so tired during lessons. He received Captain's rank on September 15, 1907. During the summer that year, 1907, he traveled to London as Sweden's representative at the international conference on school hygiene. In 1908 he was chosen as a member of the committee to reorganize the Swedish Field Doctor Corps. In 1908 he also traveled to Skodsborgs Spa to study metabolic and heart diseases. In 1910 he was elected as a member of the Royal Academy of Military Science. During the winter of 1910–1911 Hammar studied metabolic disorders under Friedrich von Müller in München again to study metabolic and heart diseases. He also practised this with Dr. Landergren at Ramlösa. In spring 1912 he gets a government grant to study food distribution at the Austrian army for von Noorden in Vienna. Between December 1, 1915, and January 28, 1916, he travelled with his entire family through Germany and Switzerland to Marseille to visit the Huldas family. This was in the middle of World War I and there are traces that he also sought to visit the fighting to study the war medicine