12 The American Geologist. January, i897 
sections from actual survey, 4,000 acres in Lawrence County. Pub- 
lished by the Coal-Grove Co. in Columbus, in 1839, and in New York in 
18i7 by J. L. Minen & Co. 
Geological Report on the "Geological Reconnaissance of Kentucky, 
made in 1838." Assembly Document, 1839. 
On Cupellation, an easy and accurate method with the blowpipe. 
Am. Jour. Science, xxxv, p. 321. 
1840. 
Fourth Annual Geological Report of New York. State Assembly 
Doc. No. 50, pp. 209-258. 
1841. 
Fifth Annual Geological Report of New York. Assembly Doc. No. 
150, p. 57. 
1842. 
Report to the Legislature on the arranged Geological Collections for 
the State Cabinet, and those prepared for distribvition to the Colleges 
and Universities of Ohio, collected on the Geological Survey. Ohio As- 
sembly Document. Reports, 1842. 
Report on the coal mines near Owensborough, Ky., [to Hon. Robert 
Triplett]. Published in Kentucky. 
1843. 
Final Geological Report of the First District of New York, entitled 
"Natural History of New York, Part IV, Geology, by W. W. Mather, 
Vol. I." This is a quarto volume of 653 pages and 46 colored plates. 
Published by the State of New York in 1844, as one of the volumes of 
the Natural History of New York. 
1844. 
On the possible variation of the length of the day, or of the revolution 
of the earth on its axis, with corrected formulae of the appendix of the 
Final Geological Report of New York. Am. Jour. Science, xlvi, p. 344. 
On the Geology of the United States east of the Rocky mountains, 
and an enquiry into the causes that have led to the deposition of the 
sedimentary rocks, and that have caused their elevation and contortion. 
Am. Jour. Science, xlix, p. 1; 284. (This great physical question is 
considered and partially developed. This paper was written for and read 
before the National Institute at Washington, April, 1844, and probably 
published by them also, and before the American Association of Geolo- 
gists and Naturalists in May, and before the Athenian * * * * 
by request in August.) 
1845. 
On Bromine and Iodine in the Ohio Salines. Amer. Jour. Science, 
xlix, p. 211. 
An extended series of investigation was entered into, many new com- 
pounds formed, improved methods of extracting bromine contrived and 
put in operation, with a view to manufacture, but most of the papers 
were lost during his absence on lake Superior in 1845-6-7. Those that 
i-emain are in an incomplete state, and neither published nor prepared 
for publication. 
