[Plan of the White House grounds, Washington D.C.].

Covers area bounded by 17th, H, 15th streets N.W., and the Tiber Creek shoreline.

[Rough survey map of the White House and grounds, Washington D.C.].

Shows White House and Treasury buildings and grounds in the condition of 1808 or later.

Wall n. west of Presidents House : [Washington D.C.].

Survey map.

Plan shewing the present & proposed directions of the Canal between 3d & 7th Street West on the Mall : [Washington D.C.] /

Ink and watercolor.

Part of new canal : [Washington Canal, Washington D.C.].

At top of sheet: 3d Street West & marsh of the Tiber near 6th St. West.

[Map of part of the Washington Canal at the eastern end of the Mall, Washington D.C.].

Shows "Present direction of the Canal" and "New canal."

[Cadastral map of the blocks surrounding Washington Circle, Washington D.C.].

Cadastral map of area bounded by 24th, L. 22nd, and I streets N.W.

Plan of the city north of K Street next the Creek (R) : [West End, N.W. Washington D.C.].

Shows block numbers and dimensions.

Plan shewing the present & proposed direction of the Canal between 3d & Seventh streets : [Washington D.C.] /

Oriented with north to the left.

[Cadastral map of part of the West End, Washington D.C.].

Cadastral map showing unidentified tinted lots, lot numbers, and block numbers.

Plan of basin between 12 & 10th streets as laid out for the Canal Co. : [Washington Canal, Washington D.C.].

Also covers part of central business district adjacent to canal.

PHYTOPLANKTON AND NUTRIENT DYNAMICS WITH A FOCUS ON NITROGEN FORM IN THE ANACOSTIA RIVER, IN WASHINGTON, D.C. AND WEST LAKE, IN HANGZHOU, CHINA

Nutrient loading has been linked with severe water quality impairment, ranging from hypoxia to increased frequency of harmful algal blooms (HABs), loss of fisheries, and changes in biodiversity. Waters around the globe are experiencing deleterious effects of eutrophication; however, the relative amount of nitrogen (N) and phosphorus (P) reaching these waters is not changing proportionately, with high N loads increasingly enriched in chemically-reduced N forms. Research involving two urban freshwater and nutrient enriched systems, the Anacostia River, USA, a tributary of the Potomac River feeding into the Chesapeake Bay, and West Lake, Hangzhou, Zhejiang Province, China, was conducted to assess the response of phytoplankton communities to changing N-form and N/P-ratios. Field observations involving the characterization of ambient phytoplankton communities and N-forms, as well as experimental (nutrient enrichment) manipulations were used to understand shifts in phytoplankton community composition with increasing NH4+ loads. In both locations, a >2-fold increase in ambient NH4+:NO3- ratios was followed by a shift in the phytoplankton community, with diatoms giving way to chlorophytes and cyanobacteria. Enrichment experiments mirrored this, in that samples enriched with NH4+ lead to increased abundance of chlorophytes and cyanobacteria. This work shows that in both of these systems experiencing nutrient enrichment that NH4+ supports communities dominated by more chlorophytes and cyanobacteria than other phytoplankton groups.

National Park Seminary, a junior college, incorporated, for young women, Washington, D. C. suburbs [Calendar̈

Mode of access: Internet.

Contested Play and Clean Water: McMillan Park, Race, and the Built Environment in Washington, D.C., 1900-1941

This study focuses on the intersection of the politics and culture of open public space with race relations in the United States from 1900 to 1941. The history of McMillan Park in Washington, D.C. serves as a lens to examine these themes. Ultimately, the park’s history, as documented in newspapers, interviews, reports, and photographs, reveals how white residents attempted to protect their dominance in a racial hierarchy through the control of both the physical and cultural elements of public recreation space. White use of discrimination through seemingly neutral desires to protect health, safety, and property values, establishes a congruence with their defense of residential property. Without similar access to legal methods, African Americans acted through direct action in gaps of governmental control. Their use of this space demonstrates how African-American residents of Washington and the United States contested their race, recreation, and spatial privileges in the pre-World War II era.

[Map of part of S.E. Washington D.C. now occupied by the Navy Yard and adjacent squares].

Covers area bounded by Anacostia River waterfront, 10th, L, and 5th streets S.E.