Shelfmark

Hil.428

Maker

Hilger & Watts Ltd

Subjects

Geophysical Instruments; Magnetism; Magnetic variometer; Compass; Electric coils

Title

Geophysical Instruments: Magnetic Force Variometers (Vertical & Horizontal Patterns), Auxiliary Magnets, Compasses etc., Calibrating Coil, Automatic Recording Apparatus

Description

Information is presented under these headings:- Watts Vertical Magnetic Force Variometer: The Magnet System, Temperature Compensation, Sensitivity, Spirit Levels, Thermometer and Instrument Body, The Optical System, The Base, The Instrument Case; Auxiliary Magnets, Compass; Watts Horizontal Magnetic Force Variometer: Magnet System, Calibrating Apparatus for Magnetic Variometer, One Metre Extension Bar, Variometer Reflecting Head; Photographic Recording Apparatus for Variometer: Range and Sensitivity, General Description, Optical System, Recording Drum, Electrical System, [Cat. nos. S.G. 1-18, 167, accompany the following items] Vertical Magnetic Force Variometer, Horizontal Magnetic Force Variometer, Extras for Horizontal and Vertical Force Variometers, Spares for Horizontal and Vertical Force Variometers

Earliest Date

1951

Latest Date

1951

Pages

10

Address

48 Addington Square, London, S.E. 5

Other Makers

Cat no

CS 64 D, CS 64/2D

Contents List

Hardback

Prices

Index

Illustrations

Yes

General Ref