Open AccessThe Cambridge Pendulum Apparatus
Author(s) -
Jackson J. E.
Publication year - 1961
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1961.tb06826.x
Subject(s) - pendulum , invar , work (physics) , geology , computer science , physics , engineering , mechanical engineering , thermal expansion , thermodynamics
Summary The three‐pendulum method, developed and used by Lenox‐ Conyngham, was superseded in 1930, on the arrival of a new vacuum box for swinging two pendulums. With three invar pendulums taken over from the earlier apparatus and three new ones acquired in 1931, this box is the centrepiece of the apparatus which has been in use up to the present day, for geophysical investigations and for establishing gravity reference stations in many parts of the world. This article describes briefly the apparatus and the various modifications of procedure and changes of auxiliary gear that have taken place in the past 30 years. A list of the work done with the apparatus is given.