Figure 12. — Details of Steinheil's telegraph. From Dinglers polytechnisches 

 Journal, 1838, vol. 70, pi. 4. 



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2_ 













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Figure 13. — Steinheil's two receivers: one to ink combinations of signs on a moving paper 

 tape and one to produce two different bell sounds. From E. Feyerabend, Der Telegraph von 

 Gauss und Weber . . .; Berlin, 1933, p. 63. 



PAPER 29: DEVELOPMENT OF ELECTRICAL TECHNOLOGY IN THE 19TH CENTURY: II 



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