'Forage d'un piquet de fusion au profil bleu' 2 Sept. 1930 Allouard Vintage glaciology! ⏳❄️ Installation of ablation stakes at the Tré la Tête Glacier using a bucket of hot water in lieu of steam ice drill! 🔥🧊🫗 Source @GallicaBnF @matthias_huss
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