Annual report upon the geological exploration of the fortieth parallel from the Sierra Nevada to the eastern slope of the Rocky Mountains: Being Appendix KK of the Annual Report of the Chief of Engineers to the Secretary of War for 1875
I have the honor herewith to present a brief annual report of the operations of the geological exploration of the fortieth parallel, under my charge, for the year ending June 30, 1875, and to state in explanation of its delay that, since the date when it should properly have been rendered, I have been severely ill, and confined to my bed more than half of the time. The entire year bas been spent in office here in New York, and devoted to the preparation of reports and their accompanying illustrations. I had hoped ere this to have been able to go to press with a completed work, and could easily have done so but for the impossibility of getting from the various paleontological authorities (to whom we were obliged to commit our collections of fossils) any final lists. It is the misfortune of geology to be more or less dependent on this branch of specialists. Without their specific determinations, the geological maps, even, cannot receive their ultimate color-designations, nor can reports, which like ours, involve a wide range of stratigraphy, be safely written. So it has happened, in spite of every effort on my part, that these scientific autocrats, although abundantly promising, have again and again disappointed me, and caused a wearying delay in the publication of our report. Vexatious as this has been, it has not, however, failed to add a compensating value to the work at large, in that it has yielded us the time to elaborate certain important branches, as I shall presently show. The following statement of what has been done in each special branch will give a clear idea of the present status of our work.