130 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Analyses of mud or sediment from mud-springs. 



White sediment. 



Silica 42.2 



Magnesia 33.4 



Lime .^ 17.8 



Alkalies .* Q.Q 



100.0 



Lavender sediment. 



Silica 23.2 



Alumina 58. 6 



Boracic acid 3. 2 



Oxide of iron 0.6 



Oxide of calcium 4.2 



Water and loss 5.2 



100.0 



Pinlc sediment. 



Silica 32.6 



Alumina .52. 4 



Oxide of calcium 8.3 



Soda and potassa 4.2 



Water and loss 2.5 



100.0 



Siliceous deposits of Jiot sjjrings, on the shores of the Eotomahana, New Zealand, analyzedhy 



Mr. Mayer. 



[Xo. 1, Tetarata, two samples, a, an earthy, powdery mass ; 6, solidified incrustation ; No. 2, Xagahapu; 



No. 3, "Whatapobo ; Xo. 4, Otukapuarangi.] 



Silica 



Water and organic substances. 



Sesquioxide of iron 



Alumina 



Lime 



Magnesia 



Alkalies 



0.43 

 0.40 

 0.38 



86.80 

 11.61 

 Slight in- 

 dication. 



Slight in- 

 dication. 



I, Pattisoii (Pliilos. Magazine, 1844:, p. 495) and, II, Mallet (Philos. 

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

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

 the localities : 



I. n. 



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 yil. 



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

 AND DOWN EAST FORK, TO BOTTLER'S RANCH. 



We were j'oiued at our Hot Spring cainj) by Lieutenant G. C. 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 wa^^ 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 



