162 
IOWA ACADEMY OF SCIENCES. 
into solution at the expense of the hydrogen which is set 
free. In the cases of iron, tin and bismuth it seems evi- 
dent to the eye that oxides are first formed, and in all 
cases where reduction occurs the view is simplest and 
most nearly in accord with the facts, that the metal is 
oxidized and that the oxide dissolves in the excess of the 
acids, or remains insoluble as in the case of bismuth. 
Iowa College, Grinnell, Iowa. 
April 11, 1904. 
PERIODICAL LITERATURE IN IOWA ON THE SUB- 
JECT OF CHEMISTRY. 
BY W. S. HENDRIXSON. 
The following is a list of the chemical periodicals in the 
State of Iowa, with the extent of the files and the names 
of the libraries in which they may be found. The list is 
prepared and published for the information of chemists 
who may have occasion to refer to such periodicals in their 
work. So far as known the books of any file may be used 
for reference purposes in the libraries which contain them 
and under certain restrictions, in some cases, they may be 
taken out for purposes of reference. In some cases the 
books are in the private libraries of chemists connected 
with the institutions mentioned, but this does not preclude 
their use by outside parties. 
In this list are not included fragments of sets consisting 
of only a few volumes, unless the periodicals are now being 
received. The extent of the files is indicated by years. The 
libraries in which the periodicals are to be found are desig- 
nated as follows: State University of Iowa, S. U. I.; State 
Library, S. L.; Iowa State College, I. S. C. ; Iowa College, 
I. C.; Morningside College, M. C.; Drake University, D. U. ; 
Cornell College, C. C. ; Coe College, Coe; Simpson College, 
S. C.; State Normal, S. N.; Sioux City Library, S. C. L. 
