The global carbon cycle is now usually divided into the following major reservoirs of carbon interconnected by pathways of exchange: 1  The atmosphere. 2  The terrestrial biosphere. 3  The oceans, including dissolved inorganic carbon and living and non-living marine biota.
Elizabeth Blackwell: First Woman M.D. (Barnard Biography Series, Vol. 2) Mar 1, 1997
Letter, Elizabeth Blackwell to Baroness Anne Isabella Milbanke Byron concerning womenâs rights and the education of women physicians, March 4, 1851. (Blackwell Family Papers) Words and Deeds in American History: Selected Documents Celebrating the Manuscript Divisionâs First 100 Years.