CONTENTS 



Page 



INTRODUCTION 1 



WATER- SUBSTRATE COOLING REQUIREMENTS 2 



DESCRIPTION OF NEW METHOD 4 



CO2 Liquid-Gas Phase 4 



CO2 in the System 4 



Probe and Water Flow Shield 6 



DESCRIPTION OF EQUIPMENT 6 



Probes and Caps 6 



C0 2 Supply System . . . 9 



Lifting Apparatus 9 



Temperature Equipment 11 



Sample Transportation 11 



OPERATION OF EQUIPMENT 11 



Probes and Caps 12 



Water Flow Shield, Lifting Hoist, and 



Instrumentation 13 



FREEZING PROCEDURE 14 



Problems 15 



Shut Down Procedure 15 



MAINTENANCE ' AND SAFETY 16 



DISCUSSION 16 



PUBLICATIONS CITED 18 



APPENDIX A 19 



Equipment List and Supplier 19 



APPENDIX B 21 



Cost of Equipment and CO2 21 



