Page:The Journal of geology (IA journalofgeology21894univers).pdf/234

pages on the Coals of the state, by the writer, has been issued, but a great bulk of additional information has been gathered for a final report. The field work for the report on Clays was finished last year, and the report, by Prof. H. A. Wheeler, is now well advanced. A report on the Iron Ores of 391 pages, by Frank L. Nason, was published in 1892, together with one of 280 pages on the Mineral Waters, by Paul Schweitzer. The building stones were studied first by G. E. Ladd and later by Hiram Philips, but the field work is not yet completed, and had to be suspended this year. The crystalline rocks were studied by Erasmus Haworth and the report is written, but is withheld from publication for lack of funds. Field work for a preliminary report on the glacial geology, by J. E. Todd, was completed last year, and the report will soon be ready for transmission. An exhaustive review of the paleontology of the state by Charles R. Keyes is ready for publication. All available data relating to the hypsometry of the state have been collected and tabulated, and a few months additional work will put them in shape for publication. Along with the prosecution of work on these general subjects, many additional facts for more exact and detailed geological mapping have been collected; but in addition to this, mapping of the formations has been specially done over certain important areas of the southwestern and northeastern portions of the state.

For the Area or Sheet reports, fifteen sheets have been prepared, distributed over the central portion of the state along the margin of the Coal Measures, over the southwestern lead and zinc district, and over the southeastern lead district and Archean area. These sheets are on a scale of one mile to the inch with a twenty-foot contour interval, and cover each a quadrilateral of fifteen minutes of latitude and longitude. They include, in addition to the topography and general geology, much detail of special economic importance. Three of these sheets have been engraved, and the accompanying reports printed. The others are about ready for the engraver, and the reports are partly prepared.