Boole (tree) the largest in Converse Basin Grove, was named around 1895 by A.H. Sweeny, a Fresno doctor, after Franklin A. Boole, a supervisor of the logging operation who spared the tree's life due to its great size. Before 1931, it was thought by many to be the largest tree in the world (although the General Grant Tree was more popularly known as the largest tree in the world at that time), but it is now known as the sixth largest tree, after five other giant sequoias: the General Sherman tree, the General Grant, the President tree, the Lincoln tree, and the
General Grant (tree) General Grant (tree) The General Grant tree is the largest giant sequoia ("Sequoiadendron giganteum") in the General Grant Grove section of Kings Canyon National Park in California and the second largest tree in the world. The tree was named in 1867 after Ulysses S. Grant, Union Army general and the 18th President of the United States (1869–1877). President Calvin Coolidge proclaimed it the "Nation's Christmas Tree" on April 28, 1926. Due in large part to its huge base, the General Grant tree was thought to be the largest tree in the world prior to 1931, when the first precise measurements