Ship-building. Wood v. paraffin models for model basin work; All-welded craft, comparison; Side launch of YG16 [garbage lighter, by Homer N. Wallin and Henry A. Schade]; Welded floor tests, [condensed from report by John D. Crecca]; Keel construction, U. S. S. Astoria; Eighteen-foot knockabouts; List of Bulletins published to date.