64 REPORT UNITED STATES GEOLOGICAL SURVEY. 



up of the survey, have precluded the completion of the report in full 

 according to the original plan. 



The chemical work, for which I am indebted to Dr. Henry Leffmann, 

 owing to the limited amount of money devoted to it, is not as compre- 

 hensive as wished, and the experiments as to the cause of the color in 

 the waters of the springs of the Park have only been commenced. I 

 present the results of the experiments as far as they have been carried. 

 A bibliographical appendix is added, containing the bibliography of the 

 the Yellowstone l^ational Park, Iceland, and ^ew Zealand, and thermal 

 springs in general. These have been made as complete as possible, 

 although they are not exhaustive. 



But few references to the geology, of the Park have been made, as the 

 report of Mr. W. H. Holmes will present it in detail. All topographical 

 details will be found in Mr. Hejary Gannett's report, and I have there- 

 fore merely given the situation of the springs. 



Hoping this report may prove satisfactory, I remain, with great re- 

 spect, your obedient servant, 



A. C. PEALB. 



Dr. P. Y. Hayden, 



United States. Geological and GeograpMeal Surrey 



of the Territories. 



