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 A few years later, however, in 1876, the Talmud Torah was denounced to the authorities, who began to watch it closely and to hound it. Simcha Zissel decided to open elsewhere, and re-established in Grobin, in the Kurland province. He arranged for the purchase of a fine building, situated in a spacious yard. There was a main study hall, smaller rooms for classes, a dining room and dormitories. The school in Grobin opened by 1880. Simcha Zissel, suffered from failing health which necessitated his spending long periods in his home, which was in Kelm. In 1881, he returned to Kelm,