130 



GEOLOGICAL SUEVEY OF THE TEREITOEIES. 



Analyses of mud or sediment from mud-springs. 

 White sediment. Lavender sediment. Pink sediment. 



Silica 42.2 



Magnesia 33. 4 



Lime 17.8 



Alkalies.. 6.6 



100.0 



Silica 28.2 



Alumina 58.6 



Boracic acid 3.2 



Oxide of iron 0. 6 



Oxide of calcinm 4.2 



Water and loss 5. 2 



100.0 



Silica 32.6 



AliTmina 52. 4 



Oxide of calcium 8. 3 



Soda and potassa 4. 2 



Water and loss. 2.5 



100. 



Siliceous deposits of hot springs, on the shores of the Botomahana, New Zealand, analyzed iy 



. Mr. Mayer. 



[No. 1, Tetarata, two samples, a, an earthy, powdery mass j b, solidified incrustation ; No. 2, Nagahapu; 

 No. 3, Whatapoho ; No. 4, Otukapuarangi.] 



Silica 



Water and organic substances 



Sesquioxide of iron ^ 



Alumina 5 



Limo 



Magnesia 



Alkalies 



86.03 

 11.52 



0.45 

 0.40 

 0.38 



12.86 

 1.27 



1.09 



79.34 

 14.50 

 1.34 

 3.87 

 0.27 

 0.26 

 0.42 



88.02 

 7.99 



I 2.99 



I 0.64 

 0.40 



86.80 



11.61 



? Slight in- 



5 dication. 



? Slight in- 

 i dication. 



I, Pattisou (Philos. Magazine, 1844, p. 495) and, II, Mallet (Philos. 

 Magazine 1, 853,, jd. 285) give the following analyses of the siliceous de- 

 posits on the hot springs of Lake Taupo, without, however, specifying 

 the localities : 



I. II. 



Silica -■ 77.35 94.20 



Alumina 9.70 1.58 



Sesquioxide of iron 3.72 0.17 



Lime 1. 54 Indication. 



Chloride of sodium 0. 85 



Water 7.66 3.06 



99.97 99.86 



Specific gravity , 1.968 2.031 



CHAPTER VII. 



FROM HOT SPRING CAMP, ON YELLOWSTONE LAKE, UP PELICAN CEEEK 

 AND DOWN EAST FORK, TO BOTTLER'S RANCH. 



We were joined at our Hot Spring camp by Lieutenant Gr. 0. Doane, 

 who had visited this region the previous year in company with Messrs. 

 Washburn and Langford. Captain Tyler and Lieutenant Grugan had 

 been ordered to return, with most of the escort, to Fort Ellis, and they 

 were already on their way to the post by way of the Madison Valley. 

 We remained here for a day or two, studying the hot springs and rest- 

 ing our animals. From this point Messrs. Elliott and Carrington com- 

 menced the survey of the shore-line of the lake with our useful little 

 bark, the Anna. They were absent seven days, and during the time 

 sailed around the entire shore-line, about one hundred and seventy-five 



