Test No. 100 - "Temperature & Time-Series"
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June 3 - 15, 1977
Stewart Ct. Laboratory
Sunnyvale, CA

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


1. To check temperature dependence of certain rocks & capacitors as to petroelectric (PE) output.

2. To check time-series output at fixed temperature.


A) Catalina granite R-31, coated with polyurethane, was placed under oil (Quaker State 10) in tank No. 3, 50% Dowgard (ethylene glycol) and temperature lowered to 0oC (maintained for 3 hours for stabilization). Then temperature was raised.

Fig. 1 shows curve of voltage rise during approx. 6 hrs. thereafter, from 0oC to 37oC. This rock specimen had extremely high resistance and current could not be measured with our equipment. Readings of output are in millivolts.

Fig. 2 shows the decay with time and the circadian cycles in the output for the next several days with temperature held constant at 37oC +/- .1oC.

Graphic - Figures 1 and 2

B) Electrolytic capacitor ELH-1, being hermetically-sealed in a metal can (grounded) was placed directly in the Dowgard (50% solution) in "Lo-Temptrol" tank No. 3 and temperature lowered to 0oC. This test concurrent with the rock test (a).

Output of the capacitor was sufficient to be measured in picoamperes. This output was fed to HP 425 A "Micro-volt ammeter," amplified and fed to a Houston stripchart recorder.

As the temperature rose, current rose rapidly, especially through the middle of the run, indicating (perhaps) a rate-of change effect, but balanced off as temperature reached 37oC.

Subsequently, in Fig. 2, the current fell sharply with time and showed variations from day to day, also a deep negative "glitch" on June 11 beginning at about 2130 (local time) and several lesser (negative) glitches thereafter.


a) The Catalina granite is temperature sensitive but not temperature dependent. Daily (and other) variations, as indicated in the time-series test, are present which change the output appreciably.

b) Electrolytic capcitor ELH-1 appears to be affected by rate-of-change of temperature (see note). Other factors, however, as with (a) above, appear to dominate. It is noted that the deep "glitch" which occurred on June 11th not only reversed the polarity but continued downward to -5.4 pA and did not again return to positive (except briefly) and toward the end of this test.

Note: It is possible that the peak in current output of the capacitor, reached as the temperature was rising (Fig. 1), may not be a rate-of-change effect but a momentary (secular) rise in the ELH-1 output during this period.

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