May 29, 1807.] Srieutific American. 345 … a’ a'g drumming upon it daily in- stretched over a tin horn, the creases its delicacy and ac- tonograph, curved to roughly PLATE I-TONE PHOTOGRAPHY. tivity. represent the external For a given instru ineatus or outer tube ment the figures are ex- leading to the ear drum. actly the same for a Any one…
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