170 F. V. Hayden-—Hot Springs and Geysers 
of fifty feet, filling the numerous reservoirs that surround the 
immense rim 0 basin. There were other funnel-shaped 
basins with elegantly scalloped rims, which were covered: 
over the inner side, to the depth of 10 to 20 feet, with bead-like 
tubercles of silica. Sometimes these siliceous beads were: ar- 
ranged in large numbers like Fungia corals, or like the heads of 
cauliflowers, 
In the Firehole Basin, silica predominates in the deposit, and 
so far as we could determine there was very little, if any, lime. 
Sulphur occurs in very small quantities in the lower basin, al- 
though there were two or three springs the orifices of which 
were lined with it. 
A short distance from this beautiful geyser is a remarkable 
group of mud springs. One of them has a basin fifty feet in 
SY 
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<a 
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tMup Geysers. 
most delicate pink or rose, with a base as white as snow. Pa 
e fines 
- aum. The most fastidious manufacturer of [gies 
ware, would go into eestacies over this magnificent bed of mor 
tar, that has perhaps been worked and re-worked for many 
thousands of years, 
