ANNUAL REPORT FOR 1875. 89 



One gaUon, U. S. measure, contains: — 



Grains. 

 Total quantity of Salts 657.8833 



Consisting of: 



Bi-carbonate of Lime 1 .4945 



Bi- carbonate of Magnesia 0.8782 



Chloride of Sodium 367 . 6470 



Chloride of Potassium 9 . 9064 



Chloride of Lithium 0.0244 



Bromide of Sodium 1 .0553 



Iodide of Sodium 0.0232 



Sulphate of Magnesia 89.3340 



Sulphateof Lime 76.1463 



Chloride of Calcium 109.2998 



Sulphate of Iron 0.7442 



Alumina 1.0980 



Silica 0.7320 



Acknowledgments. — The State Geologist has to thank in this 

 formal manner, the officers of the Chicago, Milwaukee and St. Paul 

 Railway, the officers of the "Wisconsin Central Eailway, the officers of 

 the Wisconsin Valley Eailway, the officers of the Chippewa Falls and 

 Western Eailway, the officers of the West Wisconsin and the North 

 Wisconsin Eailway, the officers of the Green Bay and Minnesota Eail- 

 way, for free transportation of men and materials in behalf of the sur- 

 vey. The Wisconsin Central and North Wisconsin have even put 

 trains at the disposal of the chief geologist, free of cost, in order to 

 facilitate and expediate his work. Such generous liberality cannot be 

 too highly praised. Acknowledgments are also due to Captain Knapp, 

 in command of a steamboat on the St. Croix river, not only for free 

 transportation of the party of reconnoissance, but for services in pro- 

 curing proper boats for ascending the river above the falls. Captaiii 

 Yaughan, of Ashland, also laid the survey imder especial obligations 

 for putting his tug boat at the disposal of the undersigned and his 

 party. Hotel keepers everywhere in the state have shown their sub- 

 stantial good will to the survey, by keeping men who were working 

 in the field at reduced rates. The American Express Company, 

 through the friendliness of its general manager in this state, Mr. An- 

 tisdel, has carried packages for the survey free of cost. 



In these various ways large expenditures of money have been saved 

 to the state, and the chief geologist has been enabled to accomplish 

 much more than would otherwise have been possible. The people all 

 over the commonwealth have expressed, both verbally and by letter, 

 great interest in the survey, and are looking forward with hopefulness 

 of results to the time when its final reports shall be published. 



O. W. WIGHT, A. M., M. D., 

 Milwaukee, December 30, 1875. Chief Geologist. 



