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

 

Hello, These are 2 vintage T.C.W. Co Wheaton glass bottle for chemists or pharmacists. They have a base of about 6 cm and a height of 18 cm (8 inches see picture). This correlates to about 500 ml or 0

 

GREAT ESTATE FIND HERE. AN OLD HARD RUBBER SYRINGE UNITED DRUG COMPANY. THANKS AND GOOD LUCK. Posted with eBay Mobile

 

Edwards instruments company Quack Medical diatherma . Science fiction at is best. Untested but heavy 43 lbs. Nice chrome switches. Looks like tesla arc generator. Paypal only and within 24 hours of au

 

Rare Antique Young's Improved Rectal DilatorsThis is a Great addition to your Antique Medical Collection. Young's Rectal Dilators were prescribed for constipation and hemorrhoids circa 1900 to 1940. T

 

A neat antique advertising store display canister or jar. The Canister is made of glass and has a tin lid. Both the glass and tin have excellent graphic's depicting a boy wearing a top hat and glasses

 

Description* IF YOU ARE HAVING TROUBLE WITH PAYPAL PAYMENTS LET ME KNOW THERE ARE OTHER OPTIONS AVAILABLE =WINK= Combined shipping rates by Wt & zip (NOT Per Item) Many items Items can be added

 

The Mechanical Engineer Pocket Calculator .................................... 8 images available top left. ....................................... The Mechanical Engineer Pocket Calculator/ Slide Rul

 

For parts or restauration  this Antique Microscope with Jug handle quite low. Model number 46487 made near 1910 I guess. THIS IS A BUY AS IS AUCTION, for parts or repair! Please place your highest bi

 

The box itself is pretty cool. Nice hardware on the outside and there is a compartment under the instructions that holds some paddles. From what I found on these things, it was used for in-home shock