Description: Radiometer according to Crookés. Consists of a glass container on foot with low air pressure and needle-bearing spinner with four vertical mica discs. The discs are black on one side and shiny on the other. The discs thus absorb radiation differently. The higher temperature of the dark side means that the air molecules get greater kinetic energy in collision with the dark side of the discs than with their shiny side. The result is that the spinner starts to rotate.

Catalog Number: 765-1092

UOM: 1 * 1 items

Supplier: MOLLER THERM

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Description: Vane wheel device is used for demonstrating air and heat flows generated by a burning candle, water vapour or other heat sources. Made of Aluminium and mountable on a long needle.

Catalog Number: BINH1003101

UOM: 1 * 1 items

Supplier: 3B Scientific

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Description: Milk glass scale on polished wooden board. Colored liquid filling. Measuring range -10 to +100 ° C, 0 to +80 ° R, +20 to +212 ° F.

Catalog Number: 765-1079

UOM: 1 * 1 items

Supplier: MOLLER THERM

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Description: Evacuated glass flask containing i.a. electron gun with directly heated tungsten wire cathode and a cylindrical, collimating anode. The generated beam is allowed to stroke along a semi-transparent mica disc in the center of the tube. Luminescent coating on the front of the disc makes the beam appear. Two of the edges of the back are provided with graduated scales.

Catalog Number: 765-0090

UOM: 1 * 1 items

Supplier: 3B Scientific

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