Edward S. Hoar a brother of Senator Hoar and of Judge E. Rockwood Hoar, died on Wednesday in Washington of lung trouble.

Mr. Hoar was born in 1823 in Concord, Mass., and graduated from Harvard in 1844. He studied law in the Dane Law School and in New York City. He went to California in 1849 where he was a prominent lawyer and was for a time District Attorney.

Mr. Hoar was a great friend of Prof. Agassiz and was himself quite a scientist. He was many times invited to deliver lectures on geology and other sciences by the colleges in New England but always declined.