This is mechanical articulated left hand, from early 20th century wooden detailed carved prosthetic hand in thick, very nice leather, with a perfectly working articulated thumb (with spring) very rare

 

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

 

There is one of these instruments in the British Science Museum, to whom I am indebted for the information which follows.It was invented in 1890 by one Doctor Gerald Joseph Macaura, who patented it (N

 

YOU ARE BIDDING ON A CYCLOPEDIA OF ENGINEERING VOLUME II STEAM ENGINES , INDICATORS , VALVE GEARS , REFRIGERATION 457 PAGES CHECK OUT OTHER AUCTIONS FOR THE OTHER VOLUMES I THRU VI I WILL COMBINE SHIP

 

We are offering a solid brass W. & L. E. GURLEY transit level with wooden tripod. This transit would be dated to the late 1800's. It is impossible to put a date because Gurley didn't put a serial

 

Jilka1 Store Please make the acquaintance of Haunted Henry Odd Fellow as he is affectionately known. He is an authentic articulated male human skull and torso from the early 1800's (although it could

 

c.19th Smith&Beck microscope objective lens Old Smith&Beck microscope objective damaged. Optically and cosmetically, it has severe damages but can be useful to plug a hole P&P Europe: 3.5

 

MINERS LUNCH PAIL GRAY PORCELAIN MULTI PART CREAM CITY MAKER WITH CUP A well above average NO MAJOR DENTS and only three scuffs to the finish around one inch long each two tiny chips. Looks perfect at

 

Hamilton2 If you are not satisfied with your purchase from River City Coins please return it within two weeks for a full, no questions asked refund. Rare c.1900 Great Binge Bayer Preparations Manual H

 

This is a Vintage Schell Medical Bag/ Case, Supplies Included. It is a black leather locking case with keys it measures 17 1/2 inches long 9 inches wide and 10 inches tall. It has three latches one on