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TWwENHOFEL.— Expedition to the Baltic Provinces. a 
7 
‘ 
_ Fig. 1— South side of Storo Karlso showing great variation of i 
“i in the vicinity of small reef-like masses of coral. ane 
Fig. 2.— Limestone conglomerate on the south side of Burgen Ridge, 
Nearly all the pebbles are rounded and show great wear. — . few 
years appear to suffice for the rock to disintegrate. The coral | 
reef is in the heart of the ridge. The camera was held about 
three feet above the ground. 
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