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POPULAR SCIENCE MONTHLY 



The Laugafiall Mountains near Geyser. 



Then it dips and drops into the hidden crevice somewhere below your 

 feet, reappearing in the constricted throat below in awful commotion. 

 As it drops, the dashed, splintered, pulverized masses of water send 

 up sheets of vibrating particles from which the sun evokes a galaxy 

 of rainbows. 



The basalt rock is here seen in two series — an upper and lower — 

 and these seem separated by slaty material. This last is, however, 

 igneous in nature, though, peeked at from the overhanging cliff, it 

 curiously resembles a conglomerate in spots, becoming, however, near 

 the falls, columnar. There are curved heavy columns, and parallel 

 and converging columns, in the rock at upper points of radiation in 

 the lower flow. The top flow is divided from the lower by an inter- 

 bedded formation, which also has a sedimentary appearance. The 

 Hows are well marked and the basaltic columns well developed. 



We turned our ponies backward. It really seemed as if the great 

 wonders of Iceland were only beginning. Heckla was abandoned for 

 want of time, and we returned regretfully to Reykjavik. 



The present-day Icelander has felt the stirring agencies which 



