One long pear shaped vacuum tube with Maltese cross shaped anode
1879
Holtz 'restricted ray' vacuum tube
One vacuum tube containing mill wheel for showing the mechanical effects of "canal" rays
1907
Six vacuum tubes used in work with radium emanation
Image Iconoscope television camera tube
1938-1948
Pye D10 Photicon camera tube
1948-1950
One lemon shaped vacuum tube with anode in small extension chamber and three thin circular screens near cathode
Four vacuum tubes containing original helium samples
Two vacuum tubes of krypton made by Ramsay on Dec. 5th 1905
1905
First vacuum tube in which the emanation from radium yielded helium
Double chambered vacuum tube with separating wall pierced in two places
1891
Experimental vacuum tube
Thomson's improved form of Perrin vacuum tube
1925
Reproduction "Fountain of Fire" vacuum tube
1705
De la Rive's vacuum tube for demonstrating the Faraday rotation of cathode rays in a magnetic field
Geissler vacuum tubes
1855-1883
Holtz 'restricted ray' vacuum tube
Three vacuum tubes of the "H" form containing helium
1906
Long vacuum tube of helium containing argon
Seven vacuum tubes containing helium from radium emanation
The first vacuum tube filled with argon
RCA 3" Image Orthicon television camera tube (in fitted wooden box)
1948-1960
Type 'XP' self-protected line-focus high-vacuum Coolidge x-ray tube
1936
RCA vacuum tube, type 12SF7, in US Army/Navy box.
Lemon shaped vacuum tubes with twin cathode for focussing
1891
Spindle shaped vacuum tube
Vacuum tube with pointed electrodes
Boat-shaped vacuum tube
Spherical vacuum tube with foil electrodes on walls and spring copper contacts
1891
One small cylindrical vacuum tube with cup shaped cathode
Six vacuum tubes (see stroke numbers).
1898
Lemon shaped vacuum tube with fluorescent mineral
Gas Discharge Tube, c 1960
1955-1965
Vacuum tube with 5 bulbs and enclosed spirals
Four cylinder vacuum tube. The cylinders contain different fluorescent liquids
One lemon shaped vacuum tube
Four vacuum tubes containing mill wheels for showing the mechanical effects of "canal" rays
1907
Two lemon shaped vacuum tubes with ball electrodes
1891
Six vacuum tubes (see 6 stroke nos).
1898
One lemon shaped vacuum tube
One vacuum tube with grid of carbon rods
1879
One cylindrical vacuum tube with sliding cylindrical sheath
1891
One cylindrical vacuum tube with sliding cathode and two test electrodes
1891
Pear shaped vacuum tube
Three bulbed vacuum tube with pointed electrodes
Long vacuum tube, on stand
1891
Geissler vacuum tube, 3 bulbs. Length 4ft 6ins.
1876
Two vacuum tubes containing mill wheels for showing circulation of residual gas
1898
Spherical vacuum tube with tube extension
1891