NIPHER MAGNETIC DETERMINATIONS IN MISSOURI, 79. 121 



Re-port on Magnetic Determinations in Missouri, Sum- 

 7ncr of 1879.* 



Bj Francis E. Nipher, Professor of Physics 

 in Washington University. 



The magnetic survey of Missouri, begun during 1S78, was con- 

 tinued during the summer of 1879. 



The instruments used were the same as in 1S78, except that a 

 new collimator magnet (marked No. i), made at the University 

 work-shop, was used for declination determinations, and a mag- 

 netometer was also constructed in order that declination and 

 intensity determinations might be made at the same time. In fit- 

 ting up this magnetometer, the deflection bar of the Coast Sur- 

 vey instrument D.g was used, and an excellent transit was loaned 

 by Blattner & Adam, instrument makers, St. Louis. 



I also take pleasure in acknowledging financial aid from the 

 following named persons : Wayman Crow, John T. Davis, Wm. 

 (jr. Eliot, Wm. A. Hargadine, Edwin Harrison, Henry Hitch- 

 cock, Chester H. Krum, Geo. E. Leighton, Wm. H. Pulsifer, 

 Jno. R. Shepley, E. C. Simmons, James E. Yeatman. 



The following named railroads furnished free transportation to 

 all points upon their roads : Missouri Pacific ; St. Louis and San 

 Francisco ; St. Louis, Kansas City, and Northern ; Missouri, 

 Kansas, and Texas. 



But for the generous aid and cooperation which has thus been 

 extended, it would have been impossible to have continued the 

 work. 



I was accompanied by Mr. Julius W. Shaub, a student of Wash- 

 ington University, whose skill and care in experimenting have 

 contributed greatly to the value of the work. 



In some cases where the determinations of 1878 were thought 

 to be unsatisfactory, the work was repeated during 1879. 



Following is a description of tlie stations where observations- 

 were made during 1879. The numbers are continued from the 

 previous report. 



Station iS « — lovja City, Iowa. In yard of Dr. Morsman, 10 yds. W. 

 and 22 yds. S. of the S.W. corner of house. Meridian from polaris 



* Read October 6th, iS;9. 



