Statistics for occurrence #1 of “Macon, Georgia” in chapter 10 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.:

...were made of lead. The Whitworth, Hotchkiss, Armstrong, and Blakely types were very effective. Lieutenant-Colonel J. W. Mallet, who was in charge of the Confederate States Central Laboratory at Macon, Georgia , devised a shell having a polyhedral cavity, instead of a conical or spherical one, in order to provide for a definite number of pieces when it burst. In explanation of his improvement, Colonel Mal...
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