1. Past, Present and Future John R. Stowell & James J. LoCoco Mount Sopris Instrument Company

2. Total Gamma GM-Tubes Scintillation NaI,CsI,BGO Spectral Gamma Scintillation Multi- Channel Analyzers

3. G-M Tubes

4. Schematic Diagram of Geiger-Muller Tube downhole probes historically used at Athabasca U3O8 sites.

5. Portable logging unit in operation at uranium mine site

6. Basic Total Count Gamma Tool High Voltage Power Supply & Pulse Conditioning Circuitry SP & Resistance Electrode Photo-multiplier Tube & Scintillition Crystal Combinable with other measurements, deviation, resistivity, induction, etc…..

7. Analog Pulse Tool Analog Gamma Pulses Real-time monitoring of analog gamma pulse tool

8. Modern Multi-Detector Digital Tools

9. Multi-Channel Spectral Gamma

10. Uranium Calibration Model

11. Uranium CPS vs. Grade

12. Model CPS vs. Polynomial Fit Grade

13. Grand Junction N5 Multi-Layer Model

14. Field Results-Modern Systems

15. Future of Uranium Logging ??