Statistics for occurrence #1 of “General W. F. Barry” in chapter 4, page 22 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:
...d character of the operations, and the limits imposed by the as yet undeveloped resources of the nation, led to the adoption, by General McClellan, of certain recommendations that were made to him by General W. F. Barry , his chief of artillery.
The most important of these were: to have, if possible, three guns for each thousand men; one-third of the guns to be rifled and either Parrott or Ordnance Department guns;...
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