Title Report of the Geological Exploration of the Fortieth Parallel, Volume IV: Palæontoloy, Part I; Palæontology, Part II; Ornithology, Part III ...

To the massive and important series of volumes in which the Report of the Exploration of the Fortieth Parallel has been published the Engineer Department of the United States has just added a sixth ...

Title Report of the Geological Exploration of the Fortieth Parallel, Volume VII: Odontornithes: A monograph on the extinct toothed birds of North America ...

We are at a critical time and supporting science journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen scientific ...

THE important survey of a portion of the north-western states of America, which was commenced by Clarence King and his able assistants in 1867, has now, after ten years of arduous labour, been brought ...