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 Zissel Halevi Levovitz Simcha Zissel Halevi Levovitz Simcha Zissel Halevi Levovitz (1908–2001) was a rabbi and founder of the first Mesivta (Jewish High School) in Boro Park, Brooklyn, and a teacher of thousands of students. He was born in 1908 in Ozovnet, Lithuania. His father, Musar movement leader Rabbi Yeruchom Levovitz, was the spiritual leader of Yeshivas Mir. Simcha Zissel studied in the yeshivas of Grodno, Telz and Brisk. At the start of World War II, he was able to flee to the United States due to the efforts of Rabbi Elimelech Gavriel (Mike) Tress. Simcha Zissel settled in Brooklyn, New York where