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Did you know?

An isobar map shows air pressure, isohyet shows rainfall, an isobath shows ocean depth, and an isopach map shows the thickness of an aquifer or any subsurface rock layer.


Instruments \ Electrical \ 

Name:

Gish-Rooney 'Megger'

Date:

1920's

Item Number:

87.04.01

Donor:

Dr. Philip H. Nelson

Type:

N/A

 

Manufacturer:

 

 

Gish-Rooney; Carnegie Institute

Description:

Electromechanical device used in electrical potential exploration ('Megger')






 

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