Electroscopes Designed for Measurements of Radioactivity

Art Snell's Hand-Built Electroscopes Art Snell's Hand-Built Electroscopes

Electroscope for Measuring Radioactive Gases Electroscope for Measuring Radioactive Gases

Electroscopes of Cheneveau and Laborde Electroscopes of Cheneveau and Laborde

Exner Electroscope Exner Electroscope

General Electric Radiation Monitor General Electric Radiation Monitor

Gold Leaf Electroscope Gold Leaf Electroscope

Landsverk Model L-64 Roentgen Meter Landsverk Model L-64 Roentgen Meter

Landsverk Model L-75 Analysis Unit Landsverk Model L-75 Analysis Unit

Lind Electroscope Lind Electroscope

Model 2 Fred C. Henson Lauritsen Electroscope Model 2 Fred C. Henson Lauritsen Electroscope

Modified Exner Electroscope Modified Exner Electroscope

Robley Evans' Lauritsen Electroscope Robley Evans' Lauritsen Electroscope

Wilfred Mann's NBS Electroscopes Wilfred Mann's NBS Electroscopes

Zeleny Electroscope Zeleny Electroscope