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Product description
Antique didactic models from physics class. Concerns 2 x a Crookes tube and 1 x an x-ray tube by Müller. Late 19th century. A: 1 large Crookes Maltese cross tube. Crookes' tube is a glass conical tube used to demonstrate the direction of travel of cathode rays. This gas discharge tube is a design by William Crookes. Crookes' tube features a movable Maltese cross. Dimensions: Height: 28cm. Width: 32cm. Depth: 12cm. B: 1 large Crookes railway tube. This type of gas discharge tube was also invented in the late 19th century as part of his research into the nature of electrons (cathode rays). When high voltage is applied across the tube, the impeller moves along the glass track. Dimensions: Height: 30cm. Width: 27cm. Depth: 15cm. C: Müller's X-Ray tube for generating X-rays. Dimensions: Height: 30cm. Width: 22cm. Depth: 12cm. Instructions for use and operation of the 3 devices can be found on the Internet.
All 3 in excellent condition. Price is for the set. Rare. Will be well packaged, insured shipping or pickup possible.
Specifications
ConditionExcellentColorsBeige, Brown, TransparentMaterialCopper, Wood, GlassNumber of items3StyleVintageHeight30 cmWidth32 cmDepth15 cm