image ms_166_12
Image number: RS.11497
Credit: ©The Royal Society

Electrometers

Date

ca.1910

Creator

Albert Edgar Gendle (1886-1923, British), Meteorologist

Object type

Archive reference number

Material

Technique

Dimensions

height (print): 147mm
width (print): 206mm
height (paper support): 202mm
width (paper support): 253mm

Subject

Content object

Description

Two instruments, captioned ‘Separate Electrometer & Ebert’s Apparatus (for comparison of parts)’.

A text accompanying the illustration states that the first instrument is for: ‘the measurement of the variations of Electric potential….An isolated pipe leading from an insulated tank juts out at a certain distance from the wall into the open air….from the end of this pipe through a very small hole water is continuously spraying. The spray takes up the Electrical potential and communicates it through a wire to a quadrant electrometer…’ The Ebert apparatus was for measuring the ionisation of the air: ‘A definite amount of air is sucked through a tube by a circular fan. The free electrons…are collected by an electrified rod in the tube which attracts them. Thus the electrons give up their charge to the rod which conveys it by means of a wire to…an electrometer’.

Eskdalemuir Observatory was constructed in 1904 to make geomagnetic and other observations. It was sufficiently remote (located near Eskdalemuir, Dumfries and Galloway, Scotland) to be free from electrical interference. Many of the instruments had originally been located at Kew Observatory

Albert Edgar Gendle (1886-1923) was Clerk Assistant to the Eskdalemuir Observatory until 1913, having worked as a boy at Kew Observatory. He then joined the Meteorological Office before becoming a lieutenant in the Royal Air Force in 1919. He was killed near Baghdad, Iraq, in 1923.

Associated place

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