PEALE.] CHEMISTRY OF DEPOSITS PEALITE, ETC. 415 



TaUe of analyses of " PeaUtes" from Yellowstone National Park. 



Locality. 



Analyst. 



a 



tJD 



c 



Hardness. 



Si02 



H:0 



A1,0., 



Platform of the Giant Geyser, Up- 

 per Eire Hole Geyser Basin. 



Platform of the Giant Geyser, Up- 

 per Fire Hole Geyser Basin. 



K^ear the Giantess, Upper Fire Hole 

 Geyser Basin. 



Neafthe Black Sand Geyser Spring, 

 Upper Fire Hole, Geyser Basin. 



Yellow Crater Spring, Shoshone 

 Geyser Basin. 



Witch Creek, Heart Lake Geyser 

 Basin. 



No. 66 Spring, Gibbon Geyser Ba- 

 sin. 



P.M.Endlich... 

 F.M.Endlich... 

 C. L. Heizmann. 



H. LefEinann 



H. Leffmann 



H. Leffmann 



H. Leffmann 



1873- 

 1873. 

 1873? 

 1881. 

 1881. 

 1881. 

 1881. 



2.4 



2.08 



6. to 6. 5 

 6. to 6. 5 



95.84 



93.00 



94.00 



94.00 



94.1 



95.4 



L50 



6.30 



6.00 



5.3 



5.2 



LOO 



2.05 



Trace. 



2-f- 

 2+ 

 2+ 

 2.03 



G.5 to 7 



6. 5 to 7 



7 



5.5 



Trace. 



Locality, 



Analyst. 





FejOa 



CaO 



LO 



Na20 



Total. 



Platform of the Giant Geyser, Up- 

 per Fire Hole Geyser Basin. 



Platform of the Giant Geyser, Up- 

 per Fire Hole Geyser Basin. 



Near the Giantess, Upper Fire Hole 

 Geyser Basin. 



Black Sand Geyser Spring, Upper 

 Fire Hole Geyser Basin. 



Yellow Crater Si)ring, Shoshone 

 Geyser Basin. 



"Witch Creek, Heart Lake Geyser 

 Basin. 



No. 66 Spring, Gibbon Geyser Ba- 

 sin. 



F.M.Endlich... 

 F.M.Endlich... 

 C. L. Heizmann . 



H. Leffmann 



H. Leffinann 



H. Leffmann 



H-Leffmann 



1873. 

 1873. 

 1873. 

 1881. 

 1881. 

 1881. 

 1881. 



2.68 



Trace... 



Trace 



Trace. 



100. 02 











199.00 



1.00 

 LOO 









100.3 



1.00 







100.2 













97.9 













* Undetermined. 



t This analysis has been included, although it is not certain that it is anything more than an old 

 geyserite which has lost a great deal of its water. Dr. Heizmann describes the specimen as being vel- 

 vety dr;ib on the surface, and of a pearly luster in the interior. It has been put in on account of its 

 agreeing so closely with the other specimens Ui the proportion of silica and water. 



ALUMINOUS DEPOSITS. 



In another portion of the report "we have mentioned the fact that 

 whenever the thermal waters come to the surface through a thickness 

 of soil, we find the springs having the character of mud springs. Of 

 course the chemical composition of the water will have some effect upon 

 the soil through which it passes, and modify it. 



I^o specimens from the collections of 1878 were submitted for analysis, 

 so that we liave nothing new to present under this head. 



In the table following the analyses of mud deposits from the Yellow- 

 stone National Park are given and compared with one of the French 

 mud springs. In Germany and France mud springs are said to be very 

 efficacious in the cure of certain diseases, and our springs may have sim- 

 ilar effects. We know so little, however, of the chemical composition of 

 the mud springs of the Park that nothing definite can be i^redicated 

 here concerning them. 



