Chaim L. Pekeris joined the Weizmann Institute as head of its Department of Applied Mathematics in 1949. He died in Rehovot, Israel on February 24, 1993. Chaim L. Pekeris Chaim Leib Pekeris (June 15, 1908 – February 24, 1993) was an Israeli-American physicist and mathematician. He made notable contributions to geophysics and the spectral theory of many-electron atoms, in particular the Helium atom. He was also one of the designers of the first computer in Israel, WEIZAC. Pekeris was born in Alytus, Vilna Governorate. With the assistance of his uncle, Pekeris and his two brothers emigrated to the United States around 1925. He
Chaim Weizmann Weizmann's contacts revealed the extent of the uncertainty in Palestine. From 1914–1918, Weizmann developed his political skills mixing easily in powerful circles. On 7 and 8 November 1914, he had a meeting with Dorothy de Rothschild. Her husband James de Rothschild was serving with the French Army, but she was unable to influence her cousinhood to Weizmann's favour. Although when he spoke to Charles, second son of Nathan Mayer Rothschild, he approved the idea. James de Rothschild advised Weizmann seek to influence the British Government. By the time he reached Lord Robert Cecil, Dr Weizmann was enthused with excitement. Cecil's