350 TRANS. ST. LOUIS ACAD. SCIENCE. 



In conclusion, it may be stated that the observations of the 

 past summer have, so far as they go, confirmed in a most striking 

 manner the suggestions in the former report regarding the cause 

 of abnormal deviations of the magnetic needle. The question is 

 not yet regarded as settled, and a more detailed examination of 

 the region between the lower Missouri and the Meramec rivers, 

 and the region between the Osage and Missouri valleys, as well 

 as that between the Missouri and the Grand rivers, is absolutely 

 necessary in order to decide the points at issue. This has now 

 been made possible through the unsolicited offer of a gentleman 

 of St. Louis, who will pay the entire field expense of the work. 



During iSSo the following gentlemen aided in paying the ex- 

 penses of the survey : John T. Davis, Joseph Franklin, Edwin 

 Harrison, Henry Hitchcock, W. A. Hargadine, Geo. E. Leigh- 

 ton, Geo. Partridge, W. H. Pulsifer. J, R. Shepley, E. C. Sim- 

 mons, Charles Speck, Albert Todd, Thos. E. Tutt, James E. 

 Yeatman, of St. Louis, and W. W. Baldwin of Burlington, Iowa, 

 and W. H. Lynch of Salem, Mo. 



The following railroads have granted free passes : St. Louis,^ 

 Iron Mountain and Southern ; St. Louis and San Francisco ; St. 

 Louis, Salem and Little Rock ; Wabash and Pacific ; St. Louis, 

 Keokuk and Northwestern ; Chicago, Burlington and Qaincy ; 

 Cairo and St. Louis. 



My thanks are due to all these and also to E. K. Woodward, 

 Jr., a student of Washington University, who rendered faithful 

 and efficient service in the field work, and to Mr. B. D. Kribben 

 of St. Louis, who assumed charge of the weather service in my 

 absence. 



