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 Ziv Simcha Zissel Ziv Rabbi Simcha Zissel Ziv Broida (; 1824–1898), also known as Simhah Zissel Ziv or as the Alter of Kelm (the Elder of Kelm), was one of the foremost students of Rabbi Yisrael Salanter and one of the early leaders of the Musar movement. He is best known as the founder and director of the Kelm Talmud Torah. Rabbi Simcha Zissel Ziv was born as Simcha Mordechai Ziskind Broida in 1824 in Kelmė. His father, Reb Yisroel, belonged to the well-known Lithuanian Braude family. His mother, Chaya, was a descendant of Rabbi Zvi Ashkenazi, the Chacham Tzvi. Chaya's