Arnold Elliott Seigel

• A convenient and accurate semi-empirical entropic equation for use in internal ballistic calculations
• A hypervelocity gun using a shock-compressed steam-heated propellant
• A study of the applicability of the unsteady one-dimensional isentropic theory to an experimental gun
• An experimental solution to the Lagrange ballistic problem
• The rapid expansion of compressed gases behind a piston
• The thermodynamic properties of argon at temperatures below room temperature as obtained from an experimental gun