Haynes new guide and motorists' complete road log of Yellowstone National Park . unp, at the foot of the Giantess mound in thedirection of Sponge Geyser, is a hole eighteen inchesacross out of which comes a thumping sound resemblingan hydraulic ram at work. Spongfe Geyser, a short distance east of the Giant-ess, is remarkable on account of the appearance of itscone, a flinty formation, porous and yellow like a eruptions occur a minute and a quarter apart and areabout four feet high. Doublet Paol, marked ^^Dangerous on the sign-board, is a good example of the overhanging crust forma-


Haynes new guide and motorists' complete road log of Yellowstone National Park . unp, at the foot of the Giantess mound in thedirection of Sponge Geyser, is a hole eighteen inchesacross out of which comes a thumping sound resemblingan hydraulic ram at work. Spongfe Geyser, a short distance east of the Giant-ess, is remarkable on account of the appearance of itscone, a flinty formation, porous and yellow like a eruptions occur a minute and a quarter apart and areabout four feet high. Doublet Paol, marked ^^Dangerous on the sign-board, is a good example of the overhanging crust forma-tion. No doubt in time it will be practically all coveredover; although this sinter formation, characteristic of theentire Upper Basin, forms very slowly. Beacli Spring, north of the Doublet, has a centralopening surrounded by a rather wide, submerged beach,which is symmetrical and practically flat. The Ear is on the summit of a mound between theBeach and the Lion group. Curiously enough it not onlyresembles an ear in shape, but the lobe is pierced and the 76 HAYNES NEW GUIDE.


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