Inefficiencies when performing this technique at large scales can be measured via density profiles created from a moving gamma-ray source. A “bow wave” forms in a very fast form of this technique that uses a wiper to distribute samples into a thin film. “Stripper” and “rectifier” setups for a form of this technique are distinguished by the location of the charge pot. Analyzing this technique’s results requires determining the slope of the (*) q-line as it intersects feed composition using the McCabe-Thiele (“TEE-lee”) method. (10[1])Finger-like indents are found on a device for this technique named for Vigreux (-5[1])(“vig-ROO”), which may use packed beads to increase surface area. (-5[2])The “simple” form of this technique cannot process mixtures called (-5[1])azeotropes. For 10 points, (10[2]-5[1])name this technique that separates liquids (-5[1])by boiling point. ■END■ (10[6])