various buildings & scenes of Caltech, Throop era, Mt. Wilson. also includes: military review 1918, original wind tunnel 1917, 1921 U of C vs OSU football game, "T" on the mountain, TCT graduates of 1916, civil engineering grads class of 1918 & 1921, Sigma Alpha Pi dinner 1915; postcard Burt to Thomas showing 100" reflector house;

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