"tube coolers"

Hertz electron tube for quantitative investigations of Inelastic collisions of electrons with inert gas atoms.

Comprises an inverted “U” tube with its ends closed by sintered discs. For use in experiments involving the measurement of cell EMF under conditions of forward, zero and reverse current flow. The bridge comprises an inverted “U” tube with its ends closed by sintered discs. This apparatus provides a more effective method of making reversible cells then the wet filter paper or agar gel methods. Dia. of arms 13mm, overall width 80mm, overall height 100mm.

Investigate the relationship between the speed of a fluid and its pressure

Students measure pressure with a precision manometer.

Mounted on a wooden stand with a scale, the apparatus is comprised of a three-limbed glass tube with rubber tubing on the center.

Explore beautiful 3-D patterns created by a magnetic field mess free.

High quality and reliable.

Study Wavelengths and Energy All With One Device

The Student Coin and Feather Tube shows the two items in a vacuum, falling at the same rate.

Highly evacuated electron tube with focusing electron gun and fluorescent screen inclined relative to the beam axis, so that the path of the beam can be seen and the effects of electric and magnetic fields can be studied. The electron beam can be deflected electrically in the electric field of the built-in plate capacitor, and magnetically by using the Helmholtz coil pair (not included). By adjusting the electric field so that it cancels the magnetic deflection, it is possible to determine the specific charge (e/m) and the velocity of the electrons.