Test No. 101 - "Catalina Granite (Berkeley) Time Variations"
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June 4, 1977
Stewart Ct. Laboratory
Sunnyvale, CA 94086

Copyrighted © by The Townsend Brown family. All rights reserved.


To observe fluctuations in petroelectric (PE) output of the specimen of Catalina granite which was tested in the mineshaft at UC Berkeley, for comparison purposes (at another location).


The specimen of Catalina granite was placed within a "Bud" metal case (cast aluminum) in constant-temperature cabinet at 100oF +/- .2oF. Output was conducted directly to Houston stripchart recorder No. 4, which was provided with 1 hr. interval marks.

Polarization voltage was bias-boosted as follows:

The 10 K resistor is provided as a "buffer" to prevent discharging the sensor during 1 hr. time marks.


The petroelectric output (PE) of this specimen of Catalina granite, with polarization maintained as indicated, does engage in diurnal fluctuations, as shown in Fig. 1.

Maxima appeared shortly after noon when external (outside air) temperature is highest. This characteristic appears to support the hypothesis that a "perithermal" effect may be present.

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