IOWA ACADEMY OP SCIENCE 
61 
IOWA, FOR THE PERIOD 1870 TO 1908 INCLUSIVE. 
1886 
1887 
1888 
1889 
1890 
1891 
1 
1892 
1893 
1894 
1895 
1896 
L897 
1898 
1899 
1900 
190'! 
1902 
1903 
1904 
1905 
1906 1907 
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