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

 

Apsley Antiques Store Home About Us Why Buy From Us Shipping Terms Contact Us Shop categories A Microscope Objective & Can By Gundlach Rochester NY Click thumbnails to enlarge Product Description

 

This mid 19th Century boxed set of 6 Medical Surgical tools Instruments are marked on the end of blade but very difficult to read I think it is B & E ?? Box measures 6" x 1 7/8" The condition: one

 

Super Cool Vintage/Antique Mercury Poison Crock Jug/Bottle.  The bottle is 3 3/8" tall and 2" wide at the bottom.  There is some pitting on the outside, and one hairline crack on the bottom.  We do

 

Vintage California Electric Blasting Caps Wooden Box This box was purchased at an estate sale. Was possibly used in the WWII era or for coal/gold mining. Appears the previous owner had painted green o

 

Hello, At this auction I offer them: 65 piece German Glass Eye Iris. This offer applies to eyes or portions of the eyes. You are bidding on all pictured eyes These are archaeological finds. The eyes a

 

sushimonster Store ANTIQUE JOHN RABONE HOCKLEY ABBEY 1219 24" 2 FOLD CARPENTERS RULER RULE

 

Up for Auction is Antique Baumanometer Portable Blood Pressure Meter 1920's Kit bag Model The wooden case is in very good conditon for its age.Minor scratches and scuffs.The item is still working and

 

Vintage Ammeter by Westinghouse 7 1/2'' wide by 4'' deep

 

D12-180 Two Square Cut Cornered Pharmacy Bottle From Polk Miller & Co. Druggists No. 900 Main Street Richmond, VA Age: 1910 Measurements: 4 5/8 inch tall 1 ¼ inch square Condition: Nice Old Bottl