1923] 



CORWIN, IN SEARCH OF SLIDE MATERIAL 



65 



less questions but conferred upon the writer the freedom of the ship, 

 authentic information was acquired relating to lake vessels, lake trans- 

 portation, and life on steam^ers engaged in Great Lakes shipping. No 

 restriction was placed on the use of the kodak and so many interesting 

 features on shipboard and along the route were photographed. The 

 pictures thus obtained will essentially improve the Museum's set of 

 slides on such subjects as "Aids to Commerce" and "Great Lakes 

 Navigation." 



The historic, commercially supreme, and beautiful St. Marys 

 River, seen in figure 32 was traversed on August fourth from Point 



Fig. 33.— The Third or Davis Lock at the "Soo," Sault Ste. Marie, Michigan. 



Detour to Whitefish Point. The details of the "Christopher's" 

 ascent of this remarkable stream and passage through the Third or 

 Davis Lock shown in figure 33 at the Soo were made a matter of photo- 

 graphic record for the benefit of Geography scholars studying the queen 

 of commercial rivers. 



All features of the operation of loading a lake vessel with iron ore, 

 and even an indication of the speed with which the work is done, were 

 photographed on August fifth when the "Christopher" tied up to a 

 dock at Presque Isle, Marquette, and in a short two hours took on 



