Influence of α-terpineol concentration on local and terminal velocities of bubbles, their dimensions and shapes was studied within solution concentration range 1·10^-5 to 1·10^-3 mole/dm³ . Bubble behaviour was monitored using CCD camera with stroboscopic illumination and high speed camera Speedcam 512. Variations of the bubble local velocity and i, prior to reaching a value of the terminal velocity. No maximum was observed at distilled water and α-terpineol concentrations c>0.0001 mole/dm³. It was found that α-terpineol adsorption coverage of ca. 6% was the minimum needed to assure the full immobili