List of Available Publications of the United States Department of Agriculture, January 2, 1932

by Alfred Judson Henry, Catherine Emma Pennington, Ferdinand Wead Haasis, Florence Elizabeth Ward, Frank Irons, Frederick Charles Lincoln, Freeman Weiss, Harold Addison Spilman, Herman M. Conway, John Robbins Mohler, Mary Aloysius Agnew, Raymond Frank Taylor, Ruth O'Brien, A. E. Wright, Rudolph Snyder, Samuel Prentiss Baldwin, Willard Jay Parvis, Lucien Benson Ernest, Ruby Kathryn Worner

1929

This glossary, issued in 1924, and revised, provides terms used in fire control.

Inflation and Performance of Three Parachute Configurations from Supersonic Flight Tests in a Low-density Environment

by Charles H. Whitlock, Richard J. Bendura

1969

Ten flight tests of modified-ringsail, disk-gap-band, and cross parachute configurations with deployment at Mach numbers and dynamic pressures corresponding to conditions expected during entry into a Martian atmosphere have been completed. Comparison of flight results indicates that theoretical snatch force values were never exceeded when the deployment techniques of these tests were used. Opening loads showed no definite trend with Mach number. Values for filling times compared favorably with generally accepted empirical curves based on 15-percent geometric porosity. Canopy stability was good when Mach numbers were below 1.4 for the modified-ringsail and disk-gap-band configurations.

Famous Trees

by Charles Edgar Randall, Daisy Priscilla Smith Edgerton

1938

Trees by their very nature are landmarks and memorials. They are therefore identified with human happenings. Trees also have more than the allotted life span of man and carry their association through generations of men and women. Thus they often figure not only in biography but also in history.