236 Address before the Association of American Geologists. 
has made six reports: the first of thirty six pages, the second of 
thirty pages, the third of fifty four pages, the fourth of thirty two 
pages, the fifth of one hundred and sixty one pages, and the ae 
of one hundred and thirty two pages. 
Dr. Charles T. Jackson was appointed state geologist of Maiti; 
in 1836, and he has since made three reports; the first of one 
hundred and twenty eight pages, the second of one hundred and 
sixty eight pages, and the third of three hundred and forty pages. 
He has also surveyed the public lands of Maine and Massachu- 
setts, and made two reports, In 1839, the same gentleman was 
appointed to survey Rhode Island; and his final report, of three 
hundred and twelve pages, with a geological map and sections, 
appeared in 1840. “In 1840, he was commissioned to survey New 
‘Hampshire, and his first annual report will soon appear. ‘The 
survey of Connecticut has been made by Dr. J. G. Percival and 
Prof. Charles U. Shepard. The latter made a report in 1837, of 
one hundred and eighty eight pages, upon the economical-miner- 
alogy of the state. The report of the former gentleman has not 
yet been published, but is expected:in the course of the ensuing 
year. ‘The survey of Pennsylvania was’ begun in 1836, by 
Prof. Henry D. Rogers, who has made five annual reports; the ~ 
first of twenty two pages, the second of ninety three pages, the 
third of one hundred.and nineteen pages, the fourth of two hun- 
dred and fifty two pages, and the fifth of one hundred and sev- 
enty nine pages. ‘I'he survey of Ohio was committed to’ Prof. — 
Mather, as principal geologist, assisted by Dr. S. P. Hildreth, Profs. 
John Locke and J.C. Briggs, and J. W. Foster. ‘Their first re- 
port of one hundred and thirty four pages, was made in 1887, 
and their second of two hundred and eighty six pages, with nu- 
merous drawings; in 1838. Delaware commenced this work in 
1837, under the direction of James C. Booth, Esq., who has made 
two annual reports of a few pages, and his final report of one 
hundred and eighty pages, is nearly through the press. In Mich- 
igan, the survey was committed to Douglass Houghton, Esq. 
‘with assistants. His first report ‘of thirty seven pages, was made 
in 1838, and his three subsequent ones of one hundred and 
twenty three, one hundred and twenty four, and one hundred and 
. "ea aa in suecessive’years: In 1837, Dr. D. D. Owen 
‘commenced te ge OE 
| “pages. In. Kentucky, the 
