The same has been done at the greater number of the other points occupied as 

 main field-stations in the years 1871, 1872, and 1873. 



These meridian-lines may serve various purposes in checking future surveys in 

 adjacent areas. 



Very respectfully, your obedient servant, 



GEO. M. WHEELER, 

 Lieutenant of Engineers, in Charge. 

 Brig. Gen. A. A. HUMPHREYS, 



Chief of Engineers, United States Army. 



NOTE. The results from the observations made during the field-seasons of 1871, 

 1872, and 1873, at the remaining primary stations, twenty-two in number, will appear 

 in Volume II of the Reports of the Survey, as proposed in the Annual Report of the 

 Chief of Engineers for 1878, Appendix EE. 



