This report is intended to supplement the report by Mr. Niles on Metal Spars, Serial No. 2895 (Air Corps Information Circular, Vol. VII, No. 622), simply by adding the information received from tests on four additional spars. These spars are late arrivals of the same group used in the previous tests and are not intended for the "Intensive study" outlined in the report mentioned above. The spars were tested in the same jig used by Mr. Niles and in exactly the same matter. The ultimate stresses will be obtained and an effort made to classify the spars as to merit, according to the system used in the previous report.