197 



Use.— In conclusion it sliould be said that a trial of the first slide 

 made it evident that the use of such illustrations would materially in- 

 crease the facilities for teaching geography and increase the educational 

 value of the work accomplished. Such material may not only help the 

 lecturer to avoid technical description of features usually not illustrated 

 at all, when simplicity of treatment is demanded, but with this aid he is 

 enabled to show his class or audience a mass of facts upon which he 

 bases his interpretation of the phenomena discusssed. By this means, 

 the lecturer may even treat somewhat technical and involved problems 

 so that they may be made easy to comprehend, and, most important of all, 

 whatever geographical knowledge be absorbed, is properly attained 

 through the exercise of observation, comparison and deduction. For 

 just so far as the student subjects himself to such mental discipline, in 

 the same degree does he acquire a scientific knowledge and the power 

 of analysis that is lasting and of true educational value. 



The picture attached below is a copy from the negative from which 

 the lantern slide was prepared.* 



River Bends and Bluffs. 



By Wm. M. Heiney. 



Bends and bluffs of rivers are interdependent. While under the uni- 

 versal river law of taking the course of least resistance, the embryonic 

 bluff must first exist, the matured bluff is the product of the river's 

 course. But, early the relation begins shifting, and the bend becomes 

 the consequence of the bluff. Again, however, the bend batters down the 

 bluff, so that the relations first attained are repeated. 



The above propositions are verified by tracing the historical relation 

 of the bluffs and bends in a very crooked section of about fifteen miles 

 of the Salamonie Rivei", found in the southern part of Huntington County, 

 Indiana. 



Fig. A represents the stream in its present course, with the bluffs and 

 their connecting ridges, which define the territory over which the stream 



•■■■ I will be glad to correspond with any per8"n who desires to obtain copies of these slides 

 for school or college collections. Others are being prepared. 



