464 THE JOURNAL OF GEOLOGY. 



on the Duluth, South Shore and Atlantic Railroad, gives a good 

 idea of the method employed in handling large quantities of ore. 

 The different modes of occurrence of the copper of Michigan 

 are shown by a number of well selected specimens ; while the 

 copper in ingots, sheets and wire is well displayed. „ Interesting 

 wooden models are given of the shaft house and mills of the 

 Calumet and Hecla mine, and of the rock and shaft house of the 

 Tamarack mine. Other interesting features of the exhibit are a 

 number of pre-historic copper implements from Michigan, and 

 arches and columns of brown sandstone produced in the state. 



The Wisconsin exhibit contains some good material, but it 

 seems to be arranged more to give prominence to fine specimens 

 than to show systematically the products of the state. The lead 

 and zinc industries of the southwestern part of the state are well 

 represented, but the great iron interests of the northern part of 

 the state are neglected, one pile of ore indefinitely marked "iron 

 ore" and a few other odd specimens being all that are displayed. 

 Some good specimens of granite and columns of red sandstone 

 are also exhibited. In addition, various mineral specimens are 

 displayed, some of which have come from other localities than 

 Wisconsin, and are therefore misleading to the uninitiated. 



Minnesota confines its exhibit almost entirely to its greatest 

 mining industry, i. e., the iron of the northern part of the state, 

 and in this department the exhibit is very good. Some building 

 stones and a few mineral specimens are also displayed. A 

 wooden model of the Chandler mine, and a number of maps 

 showing the mines and the geology of the state also form a part 

 of the exhibit. 



Iowa makes a small but fairly characteristic exhibit, consist- 

 ing mostly of coal, building stones, etc. A feature of the exhibit 

 is an artificial "drift" in a coal mine, showing the mode of 

 working and transporting coal on underground tramways. A 

 model of a coal shaft and breaker is also given. 



The Missouri exhibit is excellently arranged, and is 

 thoroughly indicative of the resources of the state. The lead, 

 zinc and iron industries are well represented, and pig lead and 



