Simcha Blass Simcha Blass Simcha Blass (November 27, 1897 – July 18, 1982; ) was a Polish-Israeli engineer and inventor who developed the drip irrigation system with his son Yeshayahu. Simcha Blass was born in Warsaw, Poland, which was then part of the Russian Empire, to an Orthodox Jewish family. He was active in the Jewish self-defense units organized in Warsaw to defend Jews during the end of World War I. His engineering studies in Warsaw were interrupted by the Polish-Soviet War and completed after that war. During the war, he was recruited to the Polish Army, there he invented for the
Simcha Rotem is portrayed by actor Stephen Moyer. Simcha Rotem Simcha Rotem (born 1924 Simcha (Szymon) Rathajzer , also known as Kazik his nom de guerre) is an Israeli veteran, who was a member of the Jewish underground in Warsaw, and served as the head courier of the Jewish Fighting Organization (ZOB), which planned and executed the Warsaw ghetto uprising against the Nazis. He was a member of the "Akiva" youth movement. In 1942 he joined the ZOB. Rotem became particularly useful as a courier for the Warsaw Ghetto fighters. The nickname "Kazik"—an abbreviation of a Polish name "Kazimierz" (Casimir), which means