CONTENTS 
INTRODUCTION. . . page 1 
APPARATUS... . 2 
The Strut... 2 
Temperature Indicating System... 5 
Pressure Indicating System. . . 10 
Data Recording Systems. . . 13 
Over-All Accuracy and Precision. . . 19 
DATA REDUCTION... 22 
Linearization of the Output of the Thermistor Bridges... 22 
Depth Compensation. . . 25 
Interpolation for Depth of a Given Isotherm... 25 
Final Form of the Reduced Data... 29 
RESULTS... 32 
RECOMMENDATIONS. . . 32 
APPENDIX A: MODIFICATION OF L. J. ANDERSON'S 
COMPENSATION METHOD FOR THERMISTOR BEADS... 33 
APPENDIX B: OPTIMUM PARAMETERS FOR LINEARIZING 
THERMISTOR TEMPERATURE BRIDGES... 41 
Introduction. . . 41 
Theory... 46 
Example... 48 
Discussion. . . 49 
Conclusions and Recommendations. . . 54 
REFERENCES... 55 
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