104 Minnesota Academy of Science 



chell's history and bibliography of the mineral deposits of Minne- 

 sota, with an enumeration of such minerals as are known to occur 

 in the state, comprise 36 pages at the close of the second volume 

 of the Bulletin and was read in October, 1882. His retiring 

 presidential address in '82 was on a near-home subject, "The 

 Geology of Minneapolis, being a report on the product of the 

 drilling of an artesian well at the Washburn A mill and com- 

 paring it with the various geological formations throughout the 

 Slate." 



The fruits of the investigations of the busy state geologist 

 continued to be seen in such occasional papers as "Notice of the 

 Discovery of Lingula and Paradoxides in the Red Quartzites 

 of Minnesota" in Oct., '85, and "Tronbearing Formations of 

 Northeastern Minnesota" in Oct., '87. From a joint excursion 

 jof the Geological Society of America and of the A. A. A. S. from 

 their Toronto meeting into the Huronian region northeast of lake 

 Huron resulted the paper in Oct., '89, on "The so-called Huron- 

 ian rocks in the vicinity of Sudbury, Ontario." A year later 

 appeared "The Eastern Equivalents of the Minnesota Iron 

 Ores." 



A pause of six years in Prof. Winchell's otherwise contin- 

 uous activity in the little meetings of the Academy was ended 

 by his paper in Dec, '96, on "Some Features in the Geology 

 of Northeastern Minnesota," printed in full in his American 

 Geologist for July, '97, and by his third period of the presi- 

 dency of the Academy, that of the years 1897-8. At the follow- 

 ing meeting- in February he reported on "Glacial Lakes of St. 

 'Louis and Nemadji." As the Academy's president he had the 

 honor in Nov., '97, of heading a committee which gave a public 

 reception to Dr. Nansen, the Arctic explorer. 



"The Retreat of the Ice Margin Across Minnesota" in Feb., 

 1901, and a "Review of the Question of the Age of the Fossil 

 Man of Lansing" in Mar., 1903, give but traces of his Academy 

 faithfulness during a period of incomplete records. His paper 

 on "Deep Wells as a Source of Water Supply for Minneapolis" 

 in Feb., 1905, was the beginning of many demands upon his 

 time and expert knowledge in the public agitation for this source 

 of supply for the city instead of a filtration plant for the river 

 water. Most patiently and serenely, amid the often heated de- 



