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Scientific American Supplement, No. 275, April 9, 1881
25185

Scientific American Supplement, No. 286, June 25, 1881
25186

Scientific American Supplement, No. 288, July 9, 1881
25187

Scientific American Supplement, No. 299, September 24, 1881
25188

Scientific American Supplement, No. 303, October 22, 1881
25189

Scientific American Supplement, No. 312, December 24, 1881
25190

Scientific American Supplement, No. 315, January 14, 1882
25191

Scientific American Supplement, No. 324, March 18, 1882
25192