In a paper to The Institute of Marine Engineers in London on January 29th, entitled Recent Development of the M.A.N. Marine Diesel Engine, Prof. Dr. Ing. E. Sorenson (Director in Charge of research and development, M.A.N.) and Dr. Ing. F. Schmidt (Engineer in charge of the design of large two-cycle engines, M.A.N.) gave some information concerning the lubrication of these large engines. In connection with cyclinder lubrication, they said :—