FIGURES (Cont'd) 



Page 



17. Current Station 18, 9 August 1960 73 



18. Current Station 19, 10 August 1960 74 



19. Current Station 20, 7 September 1960 74 



20. Current Station 21, 15 September 1960 75 



21. Current Station 22, 16 September 196 75 



22. Current Station 24, 17 December 1960 76 



23. Current Station 25, 28 December 1960 77 



24. Current Station 26, 30 December 1960 78 



25. Minimum Air Temperatures at NAF McMurdo and Minimum 



Observed Air Temperatures at the Icehole 88 



PLATES 



I. NAF McMurdo Viewed from Observation Hill • 3 



II, Stanford University Biological Laboratory, NAF McMurdo .... 3 



III. The POLECAT, Snow Vehicle 5 



IV, Assembling the Sled for Bottom Sounding 5 



V. The 8-inch Jiffy Power Ice Drill 6 



VI. Making a Bottom Sounding. Mt. Erebus in Background 6 



VII. Looking Back Along the Trail. Observation Hill, The Gap, 



and Crater Hill in Background ................. 8 



VIII, First Step in Erecting the Icehole Station; Chopping and 



Drilling the 5-foot Square Hole ..... 10 



IX. Drilling the Upper Portion of the Icehole with 1-foot 



Remington Ice Auger 10 



