13" X-Ray Tube.
This x-ray tube is in working condition
and came from a university.
Glass Leyden Jar.
Early 19th century Leyden jar by Scientific Co. Similar to a capacitor, these were used to
store static electricity. This one is in nice condition with the inside and outside foil at least
95% intact.
Leeds & Northrop Co. Electrical Device
This electrical device is housed in a quarter sawn oak box and is marked Shell Development Co.
on the front label. The leather handle is missing from the top of the box, but the device is in
good condition otherwise. This was probably manufactured around 1920.
Leyden Jar.
This Leyden Jar was manufactured by Scharr & Company Scientific Apparatus,
of Chicago, Illinois. It measures 9" tall. It was probably used in
classroom demonstrations of electrical capacitance.
Spark
Coil on Mahogany Base.
Glass Electroscope c1800's.
This flask shaped glass electroscope is almost 8" tall and was used in laboratory experiments to
show the presence of electricity. This item is in all original condition except the small pieces
of foil are no longer connected to the center rod.
Glass Electroscope c1880's.
This electroscope stands 8 1/2" tall and dates to the late Victorian period. It is complete and
still has both pieces of foil still intact. It was used in a university laboratory to show the
presence of electricity. There is a small chip in the wood base at the back near the glass, and
a few worm holes in the wood which do not detract from the appearance.
Cathode Ray Tube.
This cathode ray tube is 12" long and stands 7 1/2" tall in its
original walnut base, included with the tube. It lights up with a blue electron
stream that causes the center metal plate to fluoresce a bright blue. This
tube is a bit different from some similar ones in that the anode end lights up
with a green color. This tube is all original and came from a European
university.
Nice
Electrical Spark Resonator Experiment Table In Near Mint Condition.
This item was used in conjunction with a Ruhmkorff coil in electrical
experiments. It dates to about 1890. There are two hinged brass arms with
ebonite handles, each 12.5 cm. The round ebonite plate (isolated above the
wooden stand) is 4.6 cm in diameter. The size of the mahogany base is 13.5
cm X 7 cm. It has no trademark or makers sign, but originated in France.
It weighs 160 gr. and both arms are fully adjustable. The drawings are from the
book "The Ruhmkorff Coil" published in 1885.
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