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 Elberg Simcha Elberg Rabbi Simcha Elberg (known as שמחה עלבערג in Hebrew) (1915–1995) was a renowned Talmudic scholar and the chairman on the executive board of the Union of Orthodox Rabbis for 25 years. He was also on the executive committee of Agudath Israel of America. Rabbi Elberg was born in Poland and ordained as a Rabbi in Warsaw by Rabbi Menachem Ziemba. He studied at Warsaw’s Emek Halacha Yeshiva, where his main teacher was Rabbi Natan Spigelglas. He edited the yeshivah’s journal, as a means to combat Haskalah, or Enlightenment. He went to the Montreaux yeshivah between 1935 and 1936