Grant, Ulysses S. (Ulysses Simpson); 1822-1885;Civil War;Politicians Presidents;Politics and government;Generals
The Chronology of Ulysses S. Grant's life is extracted from the 31 volumes of the Papers of Ulysses S. Grant and is presented here as a full-length time line of Grant's life.
Knox, James, 1786-1864; Pickens County (Ala.); Presbyterians; Agriculture; Slavery; African-Americans; Somerville, James, 1827-1868; Oak Grove Presbyterian Church (Franconia, Ala.); Sons of Temperance of North America; Cotton; Presbyterian Church...
Diary kept from March 1848 to February 1851 by James Knox (1786-1864), a planter and Presbyterian church elder in Pickens County, Alabama. The diary records planting, harvesting, and other agricultural work, as well as Presbytery meetings and...
National Network of Libraries of Medicine's Sheila Snow-Croft leads a session on free online resources available through the National Library of Medicine during the 2008 MegaResource School Librarian Workshop.
National Network of Libraries of Medicine's Sheila Snow-Croft leads a session on free online resources available through the National Library of Medicine during the 2008 MegaResource School Librarian Workshop.
Edison in 1902 started Edison in 1902 started to Gold Mould cylinders, this process uses a oversized groove and a large wax master. The master is placed in a vacuum with 2 pieces of gold leaf. High voltage is introduced to the gold leaf in the...
Edison in 1902 started to Gold Mould cylinders, this process uses a oversized groove and a large wax master. The master is placed in a vacuum with 2 pieces of gold leaf. High voltage is introduced to the gold leaf in the bell jar, and vaporizes...
Edison in 1902 started to Gold Mould cylinders, this process uses a oversized groove and a large wax master. The master is placed in a vacuum with 2 pieces of gold leaf. High voltage is introduced to the gold leaf in the bell jar, and vaporizes...
In 1908 Edison increased the playing time of the cylinders. From 1888-1902 the speed of the records varied so the record could fit the song, anywhere from 90-144rpm. After 1902 the speed was standardized at 160rpm. In 1908 Edison cylinders...
In 1908 Edison increased the playing time of the cylinders. From 1888-1902 the speed of the records varied so the record could fit the song, anywhere from 90-144rpm. After 1902 the speed was standardized at 160rpm. In 1908 Edison cylinders...