



"Mmmtiwiii iiu Item nil ii un iwimitannttiMBlwnii 



Figure io. — Gauss and Weber's telegraph of 1836. From 

 E. Feyerabend, Der Telegraph von Gauss und Weber . . .; Berlin, 

 1933. P-4I- 



Figure i i . — Oblique view of Steinheil's telegraph. From 

 A. Guerout, "L'Histoire de la telegraphie electrique," La 

 Lumiere electrique, 1833, vol. 8, p. 361. 



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



283 



