I have owned microscopes and telescopes but this lens is very puzzling. It comes apart into 4 pieces, and there is a square piece of glass among the internal parts, very odd, sort of attached to a pie

 

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

 

Description Welcome & Thank You for Shopping In the USA! A great original doctor's Prohibition Liquor Prescription stub for Whiskey...Oi (pint)! Please see photos! From the days of Al Capone, flap

 

" Antique " Five Davon Rg. Tr. Mk Microscope Lenses, In Brass Holders. First, I Know Nothing About These Lenses, All were discovered in an Old Estate, the Estate Dated back to the late 1800's, I was t

 

Scarificator Antique Blood Letting 12- Hammer blades Spring Trigger Device c.1800 Technique (creation media) brass, steel Creation period 1800-1815 Culture/Provenance Sweden / Estate of insane doctor

 

ilikoa Store ANTIQUE BAKELITE MEDICAL BINAURAL STETHOSCOPE 1940 WWII

 

A rare double ended WW 2 medical instrument by George Carsberg Ltd. London. Stainless, round double ended cylinder, with N on one end and S on the other. It has the War Department broad arrow mark on

 

Offered at auction, a beautifully mounted Antique Microscope Slide titled "Wing of Butterfly ~ China" by J.T. Norman, London. An excellent deep cell dry mount of a wing portion showing a large "Eye Sp

 

This is a Master Violet Ray Quack Medicine machine. It comes complete with all three attachments and the original paperwork.

 

A good French 19thc medical instrument for blood letting etc,this tool is called a fleam i believe and was used to let blood and various other uses,it is made of brass and steel and has 6 different bl