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Device for measuring lateral spreading of electrons

Device for measuring lateral spreading of electrons

1907-1908
Brass release device for bell jar

Brass release device for bell jar

1800-1899
INVOcell device for intravaginal culture of eggs and sperm during fertility treatment, consisting of an inner chamber, an outer chamber and a retention device, made by INVO Bioscience, USA, 2016-2019

INVOcell embryo culture device for IVF

2016-2019
High frequency (violet ray) device, made in USA, 1920-1955

High frequency (violet ray) device

1920-1955
Electrical device for solving algebraic equations, devised by Arthur Wright, with two diagrams

Electrical device for solving algebraic equations

Lightning conductor earth: Cast iron self-watering device with grid, 1918.

Lightning conductor earth: Cast iron self-watering device with grid

1918
A device for placing rings on the feet of racing pigeons (for use with a pigeon timing clock, such as 1983-245)

A device for placing rings on the feet of racing pigeons

Unidentified incomplete optical device. Card reads :- "Optical device" A243311

Optical device, incomplete

Electrostatic indicating device consisting of two glass arms freely pivoted on a lightweight stand, Galvani collection

Electrostatic indicating device consisting of two glass arms freely pivoted on a lightweight stand

1780-1798