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Scientific American, Vol. 37, No. 23 (1877) (1877)
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can Patent Agency, September 18, 1877. For further ther on, we desire to draw especial attention to it here for|cover and take account of. Doubtless Professor Mayer particulars address ‘the inventor, Mr. William S. Lempert, | two reasons. First, because it will serve as an excellent | would object… … © 1877 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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