This is a Crookes tube with multiple electrodes. The gas pressure is lower than most Crookes tubes, correct to allow electron emission in a straight line from the cathode disk while having enough air

 

Here is an antique gothic Victorian pair of tinted blue-violet, tanzanite hue, spectacles, very similar style as to what Gary Oldman wore in "Dracula". They measure 4 1/4" across with lense and frame.

 

It is complete and in good condition but has been used a lot and it has a paint spatter on it. It measures 4 1/2" long. It comes from the Upper Mississippi Valley Lead District where many Cornish mine

 

ANTIQUE VINTAGE MINER'S OIL WICK LAMP/ LANTERN. MARKED "DUNLAP PITTSBURGH". MILK CAN STYLE WITH A WIDE SPOUT. PLEASE LOOK AT THE PICTURES CAREFULLY. NO INTERNATIONAL SHIPPING. MUST HAVE A VERIFIED ADD

 

A fine antique gentleman's combined travelling pocket barometer , thermometer and compass. The white metal cased instrument contained within a leather case and comprising of a compensated barometer wi

 

Up for bids is an old miner's carbide head lamp made by Shanklin, Mfg. Co. of Springfield, IL. It is made of brass and measures 4" tall, 2 1/8" in diameter across the top. The piece has a patent date

 

THIS IS AN ANTIQUE PAIR OF VICTORIAN SPECTACLES MARKED S.P.A. ON THE NOSE BAR. LENS HAVE MAGNIFICATION. RIGHT LENS HAS A SMALL CHIP AT THE LOWER INNER CORNER NEAR FRAME EDGE.WIRE RIM ARMS ARE COMPLETE

 

Assortment of Nicol prisms in brass adjustable casings

 

Antique Wien Microscope L. Merker                                                 DESCRIPTION Up for auction is an Antique Wien Microscope found at a local estate. Designed by

 

Neat old piece. I suppose from around the turn of the century. Eye glass set. There are around 165 lenses in here in silver tone frames with tabs on each. I am sure a lot of these are not in their cor