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

 

thehoarder Store FINE ANTIQUE BRASS & CROCODILE LEATHER TELESCOPE 1900 binoculars This is a fine ANTIQUE BRASS & CROCODILE LEATHERTELESCOPEIn my estimation it dates from around the late 19th C

 

Winning bidder may use the "PAY NOW" button....PLEASE NOTE:  the USPS have raised their prices again on Insurance, Tracking and some shipping methods...I will always select the lowest cost for you bu

 

Set of 4 Vintage Apothecary Jars. Various manufacturers including Owens, Little Boy Blue. Bottles include 2 oz, 2 1/2 oz (2 of this size) and 3 oz. Could use a good thorough cleaning. Please review al

 

Antique Veterinary Medical Instruments About: These antique medical instruments are from a veterinary practitioner who had a mixed animal practice (large and small animal) in southern Illinois in the

 

Original PROHIBITION WHISKEY WINE PRESCRIPTIONS Old Medical Alcohol Pharmacy Bar

 

Up for auction is an antique drug store medicine dose cup advertising Joseph Blaszer Druggist in Cincinnati Ohio. It has embossed measurements for tablespoons, teaspoons and dessert spoons. It measure

 

NICE CIVIL WAR ERA - CIRCA 1850 - DOCTOR'S VETERINARY SURGICAL INSTRUMENT - 15" LONG - BRASS AND IRON CONSTRUCTION / BLACKSMITH MADE WITH HAND CUT WING NUT -EXC CONDITION

 

sushimonster Store RARE ALL BRASS 58cm GUNNERS SIGHTING COMPASS RULE RULER NAVIGATORS INSTRUMENT

 

Vintage ANTIQUE Civil War ? BLUED SPRING STEEL WIRE RIM READING GLASSES NOS (+.75 IS HAND WRITTEN IN FOUNTAIN PEN INK ON PAPER ON LEFT LENS) CHECK MY OTHER LISTINGS FOR LOADS MORE ANTIQUE EYE WARE.