Scientific L< 



l in the growth of plan 



II. Geology and Mineralogy. 

 Explorations made under the direction of F. Y. Hat/den, 

 ). — For reasons beyond the control of the Geologist in char 

 various parties composing the United States Geological a 

 graphical Survey of the Territories, did not commence th 



work until August. Owing to the evidence of hostility 

 ng the northern tribes of Indians it was deemed most prudent 

 onfine the labors of the survey to the completion of the Atlas 

 olorado. Therefore the work of the season of 1876 was a 

 ation of the labors of the three preceding years, westward, fin- 

 ig the entire mountainous portion of Colorado with a belt fifteen 

 ■S in width of northern New Mexico and a belt twenty-five 

 s in breadth of eastern Utah. Six sheets of the Physical Atlas 

 now nearly ready to be issued from the press. Each sheet 

 races an area of over 1 1,500 square miles, or a total of 70,00" 

 tre miles. The maps are constructed on a scale of four mil 

 1 of 200 feet, which will form the bas 





be 



i the las 



■V-'-' 



ed the 



; v..!..: 



"-S 



The 



,1 1're Indians that attacked two of the parties the previous year. 

 Five parties were engaged in field duty: one for coi 

 ido, three for topi j 



