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 leaving his son, Rabbi Nochum Zev Ziv to run the Talmud Torah in Grobin. Young men from Kelm and the surrounding areas flocked to study under Simcha Zissel and the town once again became a center of Musar. From his home in Kelm, Simcha Zissel continued to play a role in the running of the Talmud Torah in Grobin. This, however, began to be too difficult and Simcha Zissel decided to close the yeshiva. He sent a member of his family to consult his teacher, Rabbi Yisrael Salanter who was living in Germany at the time. Salanter disagreed with the