Correspondence . 1 29 
In the yannary No. of the Canadian Record of Science. The distribution 
and physical and past geological relations of British North American 
plants, Drummond. On the basal series of Cambrian rocks in Acadia, 
Mattkc'v. The prairies of Manitoba, Drummond. 
4. Excerpts and individual publications. 
Note on fossil woods and other plant remains from the Cretaceous and 
Laramie formations of the western territories of Canada. Sir William 
Dawson. Read May 35, 1887. Trans, of the Roy. Sac, Canada.] 
Irrigation in Nebraska. Lewis E. Hicks. Bulletin of the Agr. Exper. 
Sta. of Nebraska. 
Preglacial man in Ohio. G. Frederick Wright. Fort Hill, Ohio, H. 
W. Overman. Reprints from the Ohio Archi^ological and Historical quar- 
terly., Dec, 1887. 
Section of the lower Devonian and upper Silurian strata in central 
New York, as shown by a deep well at Morrisville. Charles S. Prosser. 
Proceedings of the A. A. A. S., i88y. 
The upper Hamilton of Chenango and Otsego counties, N. Y. Charles 
S. Prosser. From the proceedings of the A. A. A. S., 1887. 
The construction of maps in relief; illustrated. John H. and Ed. B. 
Harden. Trans. Am. Inst, mining engineers., fuly, i88j. 
On the discovery of a fossil bird-track in the Dakota sandstone. Prof. 
F. H. Snow. Trans. Kan';. Acad, of Science, vol. x. 
J" Foreign publications. 
Geology and Petrology of St. Abb's Head. Prof. J. Geike. Proceed- 
ings of the Royal Society of Edinburgh. 
Annual report of the department of mines, New South Wales, for the 
year 1886. Harrie Wood. Small folio; pp 206: geological maps and 
plates; reports of the geological surveyor, aud numerous subordinates. 
Sydney. 
Geolog}' of the Vegetable creek tin-mining field. New England dis- 
trict. New South Wales, with maps and sections. T. W. Edgeworth Da- 
vid, under C. S. Wilkinson, geological surveyor in charge. 4to, pp, 169. 
Sydney. 
CORRESPONDENCH. 
Brown Hematite in Allamakee county, lo-va. I have several times this 
fall visited the "iron mine" of Allamakee Co., and thinking that a brief 
description might be of interest to you, I write you this letter. 
This deposit of iron ore is located on sees. 17 and 20, township 98 north 
range 5 west, 5th P. M., about two and a half miles north of Waukon, 
the county seat of Allamakee Co. It lies on the divide between the 
Upper Iowa river on the north, and a small creek called \'illage creek on 
