The surface tension of a liquid such as water depends on the medium in which it shares (or the substance that shares with the liquid's boundary)? If that medium or substance is air than the surface tension measured would be higher than if it was glass. Correct? If you try to measure surface tension by only using the method of putting a (glass) capillary in a liquid such as water and see how far it rises, you will only calculate the surface tension of water to glass. It is not possible to calculate the surface tension of water to air this way?