RT Journal Article SR Electronic T1 Note on the age of the slaty and arenaceous rocks in the vicinity of Schenectady, Schenectady County, New York JF American Journal of Science JO Am J Sci FD American Journal of Science SP 397 OP 398 DO 10.2475/ajs.s3-29.173.397 VO s3-29 IS 173 A1 Ford, Silas Watson YR 1885 UL http://www.ajsonline.org/content/s3-29/173/397.abstract AB