SCRIPTURE. 



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Tracing lever 



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diaphragm 



Wax surface 





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Fig. 1. — Phonograph recorder. Fig. 4. — Gramophone recorder, front view. 



Fig. 2. — Tracing from a phonograph groove. Fig. 5. — Casting from phonograph grooves. 



Fig. 3. — Gramophone recorder, section. Fig. 6. — Gramophone grooves. 



Phonograph and Gramophone Recorders, , 



