From Summary: "A theoretical analysis is presented that permits estimation of the changes in piston-temperature distribution induced by variations in the crown thickness, the ring-groove-pad thickness, and the undercrown surface heat-transfer coefficient. The analysis consists of the calculation of operating temperatures at various points in the piston body on the basis of the experimentally determined surface heat-transfer coefficients and boundary-region temperatures, as well as arbitrarily selected surface coefficients."

A special circular discussing the various ways that the organization has assisted in the World War II efforts for the past several years and asking that they continue to adjust their work until the war is over.

Newsletter for the employees of The Yoder Company in Cleveland, Ohio, including news, events, and other updates of interest to workers. This issue includes a feature about a visit from soldiers sent by General Eisenhower to tour ammunition manufacturers. This copy was sent to Pfc. H. T. Gaby, who was part of the tour, in an envelope that has the company logo on the front and and illustration of soldiers jumping out of a truck on the back.