Question: Which president signed the Yosemite Grant in 1864?
About the article "Yosemite National Park", section "Abstract".

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  June 30 - The Yosemite Grant is created in the United States.  
State grant.
Forming the state grant.
Visitation and interest in Yosemite continued to grow through the American Civil War.
Unitarian minister Thomas Starr King visited the valley in 1860 and saw some of the negative effects that settlement and commercial activity were having on the area.
Six travel letters by King were published in the "Boston Evening Transcript" in 1860 and 1861; King became the first person with a nationally recognized voice to call for a public park at Yosemite.
Oliver Wendell Holmes and John Greenleaf Whittier read and commented on King's letters and landscape architect Frederick Law Olmsted was prompted by the warnings to visit the Yosemite area in 1863.
Pressure from King and Olmsted, photographs by Carleton Watkins, and geological data from the 1863 Geological Survey of California prompted legislators to take action.
Senator John Conness of California introduced a park bill in 1864 to the United States Senate to cede Yosemite Valley and the Mariposa Grove of Big Trees to California.
The bill easily passed both houses of the United States Congress, and was signed by President Abraham Lincoln on June 30, 1864.
The Yosemite Grant, as it was called, was given to California as a state park for "public use, resort and recreation".
A board of commissioners, with Frederick Law Olmsted as chairman, was formed in September 1864 to govern the grant, but it did not meet until 1866. 
Concerned by the effects of commercial interests, prominent citizens including Galen Clark and Senator John Conness advocated for protection of the area.
A park bill was prepared with the assistance of the General Land Office in the Interior Department.
The bill passed both houses of the 38th United States Congress, and was signed by President Abraham Lincoln on June 30, 1864, creating the Yosemite Grant.
This is the first instance of park land being set aside specifically for preservation and public use by action of the U.S. federal government, and set a precedent for the 1872 creation of Yellowstone as the first national park.
Yosemite Valley and the Mariposa Grove were ceded to California as a state park, and a board of commissioners was proclaimed two years later.
Galen Clark was appointed by the commission as the Grant's first guardian, but neither Clark nor the commissioners had the authority to evict homesteaders (which included Hutchings).
The issue was not settled until 1872 when the homesteader land holdings were invalidated by the U.S. Supreme Court.
Clark and the reigning commissioners were ousted in 1880, this dispute also reaching the Supreme Court in 1880.
The two Supreme Court decisions affecting management of the Yosemite Grant are considered important precedents in land management law.
Hutchings became the new park guardian.
Access to the park by tourists improved in the early years of the park, and conditions in the Valley were made more hospitable.
Tourism significantly increased after the First Transcontinental Railroad was completed in 1869, but the long horseback ride to reach the area was a deterrent.
Three stagecoach roads were built in the mid-1870s to provide better access for the growing number of visitors to Yosemite Valley.
Scottish-born naturalist John Muir wrote articles popularizing the area and increasing scientific interest in it.
Muir was one of the first to theorize that the major landforms in Yosemite Valley were created by large alpine glaciers, bucking established scientists such as Josiah Whitney, who regarded Muir as an amateur.
Muir wrote scientific papers on the area's biology.
Landscape architect Frederick Law Olmsted emphasized the importance of conservation of Yosemite Valley. 
Government-owned or -operated parks.
National parks.
A national park is a reserve of land, usually, but not always declared and owned by a national government, protected from most human development and pollution.
Although this may be so, it is not likely that the government of a specific area owns it, rather the community itself.
National parks are a protected area of IUCN category II.
The largest national park in the world is the Northeast Greenland National Park, which was established in 1974.
In the United States the concept of preserving landscapes for the pleasure of the people was established on June 30, 1864, when President Abraham Lincoln signed the bill creating the Yosemite Grant.
A policy of preservation, rather than co-usage as in the National Forests, where grazing, farming and logging are licensed, was implemented four decades later during the presidential administration of Teddy Roosevelt, and Yosemite became a national park.
Tourism and, later, recreation were the intended purposes of the lands Roosevelt set aside in the system.
John Muir was instrumental in this effort.
These parks were termed national parks and today are looked after by the U.S. National Park Service.
There are also national parks in many other countries. 
Yosemite Creek is a creek in Yosemite National Park, California, USA.
The creek starts at Grant Lakes () and flows southwest then southeast to the Merced River at Yosemite Lodge just southwest of Yosemite Village.
() The Yosemite Creek watershed, which feeds Yosemite Falls, contains .
It is largely a granite basin that was scraped clean of soil by glaciers.
Because of the shallow soil base, the Yosemite Creek watershed has little capacity to hold water, so it quickly drains as the snow melts.
Today, Yosemite Creek flows over the valley rim to create Upper Yosemite Fall.
Before its diversion about 130,000 years ago, Yosemite Creek flowed down an older channel just to the west, from which it cascaded down through the steep ravine that is now the route of the Yosemite Falls trail.