No.	Title	Date
261	The Miami River where it meets the Everglades, ca. 1902-1910.	1910
262	Midway Key (Stop 81- XIV) ( 20 photograph sets )
263	Miscellaneous correspondence	1916
264	Miscellaneous correspondence	1916
265	Miscellaneous correspondence	1916
266	Modeling light use efficiency in a subtropical mangrove forest equipped with CO2 Eddy Covariance	2013
267	Murray Key (Stop 81-XXI) ( 28 photograph sets )
268	Musa Isle Fruit Farm (Miami), 1898-1905.	1905
269	Musa Isle Indian Village, 1920-1927	1920/1927
270	Narrative of a cruise to Lake Okeechobee	1918
271	'Neath southern skies	1919
272	New River (Broward County, Fla.), 1920-1928	1920/1928
273	Notes and transcripts relating to the King survey and Hamilton Disston's drainage and sugar plantation projects	1920
274	Orchids and air plants, 1929-1933	1929/1933
275	Outlier detection in total phosphorus concentration data from South Florida rainfall	1999-04
276	Overview of Cooperative Water Quality Studies in the Everglades Agricultural Area and Lake Okeechobee	1978-07
277	PaHay-Okee (Stop 81-III) ( 20 photograph sets )
278	Papers, mainly relating to sugar cultivation in the Everglades	1932
279	Papers relating to drainage and the proposed Tamiami Railway	1918
280	Papers relating to economic endeavors	1919