Experimental data are presented for the flow of argon gas through a 0.0985 in. sq tube 12 in. long. Data were obtained for pressure ratios varying between 0.943 and 0.0027. The range of Knudsen number variation was from 0.0025 (continuum) to 2.0 (near free molecular). These data are compared to existing theoretical model predictions. A simple semiempirical model is presented and compared with the data.

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