Stalagmometric method

[1] The stalagmometric method (Ancient Greek: στάλαγμα, romanized: stálagma, lit.

[2][3] A stalagmometer is a device for investigating surface tension using the stalagmometric method.

The device is a capillary glass tube whose middle section is widened.

[3][4] In an experiment, the drops of fluid flow slowly from the tube in a vertical direction.

At this moment, the weight of the drops is in equilibrium state with the surface tension.

The drop falls when the weight (mg) is equal to the circumference (2πr) multiplied by the surface tension (σ).

The surface tension can be calculated provided the radius of the tube (r) and mass of the fluid droplet (m) are known.

The more drops we weigh, the more precisely we can calculate the surface tension from the equation.

The viscosity and surface tension which are mutually interconvertible through the friccohesity has been the most advanced version of nanoformulations.